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Senna Build Guide by TheMistCollector

Support 1M MP 12.15 OTP SENNA ULTIMATE GUIDE - FASTING ADC & SUPP

Support 1M MP 12.15 OTP SENNA ULTIMATE GUIDE - FASTING ADC & SUPP

Updated on August 10, 2022
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League of Legends Build Guide Author TheMistCollector Build Guide By TheMistCollector 402 44 897,298 Views 57 Comments
402 44 897,298 Views 57 Comments League of Legends Build Guide Author TheMistCollector Senna Build Guide By TheMistCollector Updated on August 10, 2022
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Choose Champion Build:

  • LoL Champion: Senna
    SUPPORT
  • LoL Champion: Senna
    FASTING
  • LoL Champion: Senna
    FARMING/ADC

Runes: Warden Default

1 2
Resolve
Grasp of the Undying
Font of Life
Bone Plating
Revitalize

Precision
Presence of Mind
Legend: Alacrity
Bonus:

+10% Attack Speed
+6 Armor
+15-140 HP (lvls 1-18)

Spells:

1 2 3 4
Default
LoL Summoner Spell: Barrier

Barrier

LoL Summoner Spell: Flash

Flash

Items

BLACK CLEAVER BUG

Threats & Synergies

Threats Synergies
Extreme Major Even Minor Tiny
Show All
None Low Ok Strong Ideal
Extreme Threats
Ideal Synergies
Synergies
Ideal Strong Ok Low None

Champion Build Guide

1M MP 12.15 OTP SENNA ULTIMATE GUIDE - FASTING ADC & SUPP

By TheMistCollector
Introduction
Hi everyone. I'm TheMistCollector, TMC or Mist for short. as you can guess from my name, I'm a Senna OTP, since she was out on PBE. I started playing at the end of season 7 and I got to Plat last season, it's my highest rank ever, and my goal this season is to reach Diamond (UPDATE: I DID IT :D next goal: Masters UPDATE 2: YOOO I'M MASTERS BABY UPDATE 3: GRANDMASTER, I'M GM UPDATE 3 I GOT TO CHALLENGER!!!). I know, it's not such a good elo (IT IS NOW), but the fact that she's the first and only champion that i mastered, and i have a lot of free time, I consider myself experienced enough with the champion to bring you a complete guide on her with no flaws.



Before Senna, I was a Support main, but i've always enjoyed Marksmen playstyle. When Senna got revealed, i knew she was my champion. I was there day 1 analyzing and theorycrafting with Senna, along with others... So yeah, i feel like i really know about this champion.

Btw this is my first time making a guide, so sorry for any inconsistencies and for no fancy table of content and all of that.

THIS GUIDE WILL GET CONSTANTLY UPDATED, any big change that affects Senna will be addressed. Additionally, i'm constantly theorycrafting new items and builds, if i find something OP, i will share it.

Also, english is not my main language, so if you don't understand a section of the guide or you find a small typo, please let me know!

(Apologies for the format getting kinda messy towards the end of the guide for mobile users).
Farming and Fasting
First of all... What does Farming and Fasting even means?!

Farming/ADC

This is your conventional ADC strat. You start normal ADC item, with a normal Support, you farm minions, take kills... Just as a normal ADC, nothing weird here. Throughout this guide i will be using both "FARMING" and "ADC", just so you know that i'm talking about the same thing.


Fasting

This is an alternative strat that revolves around Mists. You go Support item first, and your duo (non-marksmen) farms with normal starting item. This strategy allows Senna to "protect" her duo by poking so they can farm safely, while she gets fed with Mists and kills. Suddenly in late game, you have a champion with crazy DPS and tons of utility (almost covering both ADC and support role), and another champion with good damage and utility.

Senna can take 1-2 melee minions per wave to reach her maximum potential. Minion gold, Support item gold, and Mists crazy gold efficency make this strategy so good.
Pros and Cons

PROS

  • Mechanically simple champion
  • Easy to learn
  • Infinite scaling
  • Playstyle versatility
  • Skill expresion
  • Uniqueness in both gameplay and builds
  • Annoying to play against
  • Cool concept/desing

CONS

  • Bad early game when farming
  • Bad mid game when fasting
  • Very reliant on mists (No AD per level)
  • Low elo tilting when fasting
  • ADCs don't like to play with a Senna support (for some reason)
  • Terrible when counterpicked
  • Awkward AAs with low practice
  • DuoQ reliant when fasting (unless Master+)
Runes
In this chapter i will talk about the standar runes for Senna, as well as some other popular (but not necessarily good) ones.

Main builds:


Fasting/Farming/Support Precision


Fleet Footwork: Welcome to Cut Down meta! Fleet Footwork is the only keystone here that Senna can blindly use. It gives a MS burst which is nice for an immobile marksmen, and the heal helps her play a bit more aggresively. The main reason we go for this though is because of the access to Cut Down. In 12.12b, Senna became the champion with the lowest base HP of the game with 530 ( Yuumi has 550...). Because of this, Senna is the best champion to use Cut Down, and we should always use it when building for damage.

Presence of mind: Standar mana rune with Precision. This rune, combined with all the other mana(regen) runes/items helps her with the issue of having really high ability mana costs. It also makes poking even more valuable because it grants Mana regen. The reason we go for this instead of secondary Manaflow Band is because 1, we lose a lot of flexibility on our runes, and 2, the other two options ( Overheal and Triumph) are nothing special.

Alacrity: This rune synergizes a lot with Senna's kit. It increases both her DPS and Healing, since Piercing Darkness cooldown gets reduced by 1 second for each auto attack. You also get Alacrity stacks by picking mists (only from the ground, not by poking enemy champions) so it scales much faster than any other ADC.

Cut Down: Explained it in the Fleet Footwork section, but basically Senna has the lowest base health on the game so this rune increases your damage by a lot.

Magical footwear: Standar rune when we want access to Approach Velocity. Go Biscuit Delivery if you need early boots.

Approach Velocity: Amazing rune for Senna, she benefits a lot for having MS advantage over the enemy in the early game, as it makes collecting mists easier.

Biscuit Delivery: Decent rune when we play for the early game. It increases your health and mana sustain so you can stay in lane for longer. You should not go for this rune as Farming since you don't get punished nearly as much enough to need early boots.

Bone Plating: Go for this rune when you need the extra survivability. We take this over Conditioning because of Senna's low health pool, which means that resistances aren't as efficient.

Revitalize: This is really the only rune you can go besides Unflinching. It synergizes great with Senna's kit because it increaese her survivability as well as her team peel. It also additionally increases Fleet Footwork's heal which is nice.

Unflinching: Alternative rune to Revitalize when the enemy team has a lot of CC. Use whichever helps the most with surviving.

Nullifying Orb: Very niche option for when the enemy team is filled with Magic Damage champions.

Gathering Storm: If you go with Nullifying Orb, this is the most solid second option. You could go with Transcendence but I value raw AD more than CDR. I guess it's up to you.

Zombie Ward: When playing support, even though we're building damage, our main focus should be helping the team rather than ourselves, so we will only run this Domination runes secondary. Broken combo alongside Umbral Glaive, the amount of extra vision is insane.

Ingenious Hunter: This rune is fantastic since it decreases the cooldown of Umbral Glaive, and also of Oracle Lens and Duskblade of Draktharr.



Grasp Warden


Grasp of the Undying: After playing so many patches with Summon Aery I can safely say that Grasp of the Undying is just better for this champion. Although Aery looks like the perfect Keystone for Senna, because they're both hybrids on damage and utility, she can't effectively use the rune like most enchanters, since her only ways of proccing it are with Q and R, which are AoE abilities and she doesn't get to decide who gets the damage and who gets the shield (although E also procs it, and a lot of times during it, again she can't decide who gets the shield, and E is most effective to use when about to enter a fight, not in the middle of it). It also removes flexibility since we're locked into Font of Life and Revitalize secondary. But most importantly, It doesn't allow us to stack HP, which is the whole point of the Warden Build.
Grasp offers small extra damage and sustain for the laning phase, as well as scaling HP which synergizes with Font of Life's HP scaling healing, as well as just making Senna tankier. She has to be one of the better champions to proc this rune since she has base 600 (and scaling) auto attack range, and an ability with 1300 (also scaling) range that goes through minions, doesn't have a travel time and applies on hit effects.

Font of Life: Core rune for the Warden build, to synergize with the HP we buy.

Second Wind: Standar rune against poke.

Bone Plating: Standar rune against burst damage.

Revitalize: Great synergy with Grasp of the Undying, Font of Life, Second Wind, Locket of the Iron Solari and Senna's Piercing Darkness and Dawning Shadow. And in rare occasions Absolution's free life steal.

Presence of Mind: When we have the choice of mana runes because the primary tree doesn't include it, we always want to go for Presence of Mind. This rune is great for Senna. This rune, combined with all the other mana(regen) runes/items helps her with the issue of having really high ability mana costs. It also makes poking even more valuable because it grants Mana regen.

Legend: Alacrity: This rune synergizes so good with Senna. It increases both her DPS and Healing, since Piercing Darkness cooldown gets reduced by 1 second for each auto attack. You also get Alacrity stacks by picking mists (only from the ground, not by poking enemy champions) so it scales much faster than any other ADC.



Popular rune choices:


Legend Bloodline: This rune, again, offers Senna things that she doesn't need, self-sustain. Legend: Alacrity does a better job at keeping you alive, as well as your teammates and it also increases your DPS. There is no discussion here.

Dark harvest: This is a rune that allows Senna to deal an incredible amount of burst damage. This rune is bad on her because she is an ADC, meant to deal DPS over teamfights. You can go this rune if you expect to go fed, but i don't recommend taking the risk.

Electrocute: Same as Dark Harvest, this rune is meant to deal burst damage, but now early game focused. It's bad for the same reasons that Dark Harvest except that much worse. Don't go this rune, ever.

Ultimate hunter: It's not worth taking it because Senna is not really reliant on Dawning Shadow. It's true that Senna's Ultimate has a lot of cooldown, but losing Precision tree for a couple more ultimates is not worth.

Guardian: This rune is commonly used as Support when building Tank against poke matchups. The rune looks good at first but because the main objective of the Tank build is to stack as much HP as you can (for the Font of Life synergy), without Grasp of the Undying you lose a ton of teamfight potential, not recommended at all.

Perfect timing: This rune is sometimes used when people are afraid of certain assassins in the early game ( Zed, Elise, etc). I think the value that Magical Footwear gives cannot be compared to surviving 1 time, and sometimes you can die even when using Stopwatch. Don't use this rune, ever. especially with Black Mist Scythe, with this item, and Control Wards, building something already feels awkward, so every slot matters.

Lethal Tempo: Senna is just too slow to stack it. And the reward is? attack speed and range, thing that she really doesn't need.
Summoner spells
In this chapter i will talk about the standar summoner's spells for Senna, as well as some other popular (but not necessarily good) ones.

Main spells:


Flash: This is the best summoner spell in the game, by far. It can be used both aggressively and defensively, and can be used with other abilities (mostly Last Embrace and Dawning Shadow) to create unpredictable situations for the enemy team. Not taking this summoner spell is trolling.

Barrier: This is the standar summoner spell for support, because double Heal is a bad option. it helps for general survivability. If your ADC doesn't go Heal, consider picking it if you don't need Exhaust.

Heal: This is the standar summoner spell for farming and fasting. It helps for 2v2 early fights and for late game survivability. Go for this if you don't need Exhaust or Cleanse

Exhaust: This is a good alternative. It is meant to counter assassins and skirmishers. Against these champions it's always more valuable than Heal, since it shuts down burst damage.

Cleanse: This is a great summoner spell meant to counter heavy CC ( Ashe, Leona, etc.) or any undodgeable CC ( Twisted Fate, Annie, etc.). I always prioritize this over Exhaust since being CC means that anyone can burst me down anyways. (avoid using this when playing support, unless you when don't need neither Heal nor Exhaust)

Popular spell:


Ignite: This is NOT a good summoner on Senna, doesn't matter the role. If you are at Ignite range, you are poorly positionated.
Abilities
In this chapter I will show every ability of Senna, as well as giving general information and tips.

Passive - Absolution

Ability full description

In a nutshell, Senna's auto attacks have reduced attack speed, deal reduced crit damage, doesn't use a proyectile, gives her movement speed and deal additional on-hit damage. Hitting an enemy champion with an auto attack or damaging ability 2 times grants Senna a Mist stack. Each Mist stack gives 0.75 AD, and gives 20 range an 10% Crit chance per 20 Mists (excess crit chance grants Lifesteal instead, up to 35%). Mists can also appear when a unit dies near Senna (chance is different for each unit, also affects if Senna is the killer.)

General tips:

  • This is the most important ability in Senna's kit, since you don't have AD per level, it's important to have a high Mist per Minute ratio. 4 Mists per Minute (40 mists at 10 minutes. 100 mists at 25 minutes) when Fasting, and 2.5 Mists per Minute (40 mists at 16 minutes. 100 mists at 40 minutes) when Farming are good indicators that you're doing good.
  • 40 Mists is a generous powerspike since you gain a lot of gold worth from stats (~1500 gold) and the 40 additional range makes you a much scarier threat.
  • You can lifesteal out of Mist wraiths
  • Ally champions who kill minions with Relic Shield or Steel Shoulderguards are considered killed by Senna for Mist Spawn Chance purposes.

Q - Piercing Darkness

Ability full description

When to use:


This is your main ability, you use it to trade, for high DPS and huge healings in teamfights. If you have enough range you can pretty much hit all 10 champions with every Q, so think about your positioning.

General tips:

  • You should constantly AA anything (if minions, make sure you don't mess up the wave for your ADC) because it reduces Q cooldown, allowing you to trade more oftne
  • This ability can reduce its own cooldown when used against: Enemy turrets, enemy champions, jungle plants and enemy wards, meaning if you Q into AA against any of this things you will reduce 2 seconds of cooldown in no time.
  • This ability cannot reduce its own cooldown when used against: Ally turrets, ally champions, ally and enemy minions, ally wards, jungle monsters (dragons, buffs, small camps) and mist wraiths.
  • If you hit your Q against both a target that reduces its own cooldown and one that doesn't, regardless of target, it will still reduce it.
  • If your Q hit multiple enemy champions, it will reduce its own CD by 1 second for each enemy champion hit
  • You can use Q to clear enemy wards faster
  • Sheen and other on-hit effects procs based on enemy Spawn ID.
  • This ability is currently BUGGED (12.10 last check): If you use it while channeling Dawning Shadow the Q will go towards the ultimate's angle, not the Q target.

W - Last embrace

Ability full description

When to use:


This ability is just a generic CC, you can use it to escape, lock a target, follow up a target or opening a follow up to your allies. You can also use this ability when warding to check brushes without risk.

General tips:

  • You can W + Flash, the ability will be casted to target location from after-flash position. There is a bug that, when timed correctly, will make your W projectile look like its going from pre-flash position, but its hitbox is actually from after-flash position, making it look like it goes through enemies and suddenly hits a random target.
  • You can look to kill a low hp minion close to an enemy champion with W to surprise them with an instant root
  • Malzahar's Void Shift will block W damage, but not the root (as long as he is the main target).

E - Curse of the black mist

Ability full description

When to use:


This ability is the most tricky ability to correctly use.In the early game, you can use it to chase, you can use it when your duo is walking from base towards the lane to surprise the enemy, you can walk towards river and bring your jungler to an easy gank, you can use to scape ganks/all-ins ( Ashe can't kill you without Enchanted Crystal Arrow if you have E for example).

In late game you can use it to catch isolated enemies with a teammate, or it can be used as an overall pressure since the enemy team don't have any information. This ability is super flexible! how you use it will make a huge difference between a noob Senna and an experienced one.

General tips:

  • This ability is a big part of why Senna is annoying to play against, you can hide your whole team before a teamfight so the enemy team can't engage on anyone.
  • In the early game, you can trick the enemy botlane by walking to the sides while your duo walks towards them to engage. (HIGH COORDINATION REQUIRED)
  • Control Wards reveal you. after leaving the ward's area, you will be revealed for an additional 1.75 seconds before camouflaging again
  • If there is a Control Ward out of vision while in E, it will be revealed, so you can take it without risk.
  • You can use this ability when warding to get that extra survivability and movement speed, since squishy champions struggle to ward without being in heavy danger.
  • This ability is currently BUGGED (12.10 last check): Seemingly random abilities can target you even when you're camouflaged. Instances that i have found: Katarina's Shunpo, Prowler's Claw, Nami's Ebb and Flow, Zyra's plants.

R - Dawning shadow

Ability full description

When to use:


You want to use this ability in teamfights where you can hit the most amount of champions. It has a huge cooldown, so try to save it when close to important objectives.

Since it's global, you can also use it to snipe any enemy who got out with 1 HP. You need good coordination / high map awareness.

General tips:

  • This ability DOES NOT DAMAGE ANYTHING BESIDE CHAMPIONS. Don't try to steal objectives.
  • The shield scales with total number of mists.
  • You can R + Flash. The ability will always shoot from the original cast position. Senna will face towards the same original direction, but if you time it perfectly, she will actually face towards the blink direction (similar to Ezreal's Trueshot Barrage + Flash combo). So use it to trick enemies (very situational)
Combos
In this chapter I will show main combos that you should know to make this champion easier.

AA + Q - Basic trading/poking combo

You will use this combo A LOT in laning phase. It's an easy combo meant to deal decent damage and collect a mist from the enemy.


Q + AA - basic long range trading/poking combo

This is a variation of the first combo, it's meant to use your Q to its full potential by using it on minions and hit an enemy at max range, then follow up with the AA for the mist.


W + Q - Basic mid range pickup combo

This is an easy combo meant to catch opponents by casting W with an immediate Q for the slow. You can start hitting AAs after that


Ward + Q - Advanced long range pickup/finisher combo

This combo can be used with 2 purposes. First, you can use this combo to catch an enemy at max range with Q's slow, and you can also use it to kill an enemy out of range.


W + Ward + Q - Advanced long range pickup combo

This is also a combo to lock champions out of range. You W at max range, and then Ward+Q to slow them for an easy W hit.


W + Q + AA + R - Advanced mid range execute combo

This is the most damaging combo. It's used to burst down a single target (or more if your W roots multiple enemy champions). Try to use AAs every time you can for maximum damage. Be sure to time your R when the enemy is rooted, as they could use Flash or any mobility spell at the last second to dodge it.
Synergies
In this chapter I will explain Senna's synergy with different classes of champions.

TANKS

By far Senna's best synegry. They are very forgiving so ranged enemies will not be as punishing as it looks. They also carry a lot of CC abilities so they can peel Senna in case of assassins or bad early trades. Their high resistances make Senna's healing more effective.



FIGHTERS

Also a really good synergy. they usually have great built-in sustain so ranged enemies are not a problem either. Their all-in is better compared to tanks but they struggle to get on top of the enemy botlane.



MAGES

Overall an effective synergy. They can keep up with the range of the enemy botlane. They have a decent early game but without a lot of kill pressure.



SUPPORTS

Also a solid defensive option. they are made to help other teammates so there's no adaptaion problems. And it may doesn't look like, but supports with full wave income can be very scary opponents. You will not have a lot of damage in the early game, but you have will have great teamfight potential.



MARKSMEN

Terrible synergy. They are meant to deal DPS and have no tools to help teammates. If you want to play alongside a marksmen, play support.



ASSASSINS

By far the worst synergy for Senna. They get destroyed by a ranged botlane, they have no tools to help teammates, and they have really different objectives compared to Senna. Never pair these 2 together
Fasting Tier list

This is a prototype of a Tier list of Senna's best Fasting duos. It is all in order, meaning that if a champions is above another in the same category, it is better in my opinion. As i said, this is a prototype, so expect it to change a bit every patch even when there were no meta changes. I will now explain every tier:

Best

Best champions for Fasting Senna. Conformed by champions with good utility, damage, and tankiness and some specials interactions. If you want to climb with someone playing Fasting, you should start learning at least 1 of these champions.

Good

Still really strong picks, but not as good as the first tier. This champions are still an amazing pair with Senna but they might have a problem or two keeping them out of the "Best" tier, like not having enough peel, not having a good wave management or struggling against a double ranged botlane.

Average

As the name says, just average picks. The synergy is there, but it's nothing amazing. Some of this champions may feel outclassed by other above them, or they have some problems that are too noticeable to place them in a tier from above. I don't recommend trying to learn a champion from this list, but they're playable if you already now the champs.

Below Average

Niche picks. They work but with a lot of problems. Should be saved for specific situations or if you find the champions fun to play.

Match ups
Coming soon, sorry :(
Items
In this chapter I will talk about every item viable on Senna. I will sort them by specific builds (items that you only buy on said build, as well as their core items), and general items (items that can be bought situiationally across multiple builds). Additionally, i will cover some other popular (but not necessarily good) ones.

Lethality Support build:


Core items:

Duskblade of Draktharr - High damage and AH



This item helps Senna a lot with damage and utility, it grants a lot of damage and insane CDR, the invisibility passive is niche but good to have. Build this every match, after Umbral Glaive if you don't need healing or shielding reduction, or after Chempunk Chainsword or Serpent's Fang if you built them.



Umbral Glaive - Cheap Lethality, amazing passive.


This is an amazing item for Support Senna. Since you don't need Manamune with support item (because you already have enough mana regen) this item will give you a decent amount of AD and lethality considering its price, as well as a really broken passive. Build this as your first item every game.




Crit Build:


Core items:

Kraken Slayer - AD scaling True Damage, insane AS.



This item, alongside Guinsoo's Rageblade, is absurd in terms of damage. The AS and AD that it gives is amazing for the 2 item synergy. Additionally, it makes Absolution's free AD even more valuable because of the AD scaling true damage every 3 AAs. (This build does not need Manamune since it's primary focus are AAs). Build this item right after Wit's End as ADC, and after boots as Fasting, every match.



Guinsoo's Rageblade - High AS, special interaction.


This item is the perfect combo for Kraken Slayer, It has a lot of AS, which means more True damage procs and more Qs (that is even more kraken procs because Q is basically a free AA). Additionally, Guinsoo's passive makes AD even more valuable because of Absolution's free on-hit damage, that gets doubled every third AA. As you can see, this Double Item powerspike is absolutely insane, it boosts Senna's damage by a giant amount (It also now proc Wit's End magic damage, even better). UPDATE: Kraken and Zeal+rageblade is a better powerspike, but not usable when fasting because of the limited item slots. Build this item right after Kraken Slayer as Fasting, every match, or after at least 1 zeal item as ADC every match.



Warden Build:


Core items:

Locket of the Iron Solari - High resistances, underrated passive/active.



This is a great tank item when you can't stack Grasp because of a bad matchup, it's really cheap and it makes you surprisingly tanky. The aura, although unnoticeable, it's always there making your teammates just a little bit more tankier. The active is kind of insane, and because it also affects you, that's another extra tankiness. Build this as your first item every match.



Black Cleaver - High HP and AD, special interaction.


This item is actually pretty good on Senna, and one of the main reasons is her special interaction with it: Senna's AAs apply double BC's stacks (because of Absolution's additional on-hit physical damage). This items allows both Senna and her teammates to deal more consistent damage. Additionally, the Movement Speed passive and the stats itself synergies really good with Senna. Build this item after boots on every match, or as a last item if another item was built early on.




Lethality Build:


Core items:

Duskblade of Draktharr - Damage against squishies, good stats.



This item helps Senna a lot with damage and utility, it grants a lot of damage and insane CDR, the invisibility passive is niche but good to have. Build this item as your first item when playing Farming, or after Umbral Glaive when playing Fasting.



Manamune - High AD and Mana.


This is THE item for farming Senna. She synergizes very good with high AD and she has really high ability mana costs. Manamune allow Senna to be this damage/healing monster. Build this after Duskblade of Draktharr when playing Farming Senna every game.



Umbral Glaive - Cheap Lethality, amazing passive.


This is an amazing item Senna. Since you don't need Manamune with support item (because you already have enough mana regen) this item will give you a decent amount of AD and lethality considering its price, as well as a really broken passive. Build this as your first item when playing Fasting every match.




Situational items:

Infinity Edge - Standar.



If you don't need a situational item, this is the best option. It offers a lot of damage, while boosting your healing by a lot. Perfect for Senna. It's better than Guinsoo's Rageblade because it offers more burst damage.Build this item as ADC/Fasting after your core items when you need damage against squishies, and have 40+ crit.


Youmuu's Ghostblade - Standar Lethality


Best standar damage item after core (if you don't have 40+ cirt chance for Infinity Edge. Build this after you cores as Farming when you don't need any situational item. (4th item only, after that lethality is not that good to buy.



Edge of Night - Vs. Skillshots(and more)


This item seems like a weaker version of Rapid Firecannon for Senna, butt it can be good against specific things, such as flank mages. If you're unsure wether you build this or RFC, stick with the latter. Build this as ADC against champs like Evelynn or (assassin) Ahri, who can sneak in ignoring your range advantage and have some sort of deadly skillshot after your core items (4th item only, after that lethality is not that good to buy.



General items:


Black Mist Scythe - AD poke starter


This is the only starter support item usable by Senna. The small AD helps with poking a little bit harder while having a little more extra healing. Build this as your starter item every match when playing Supp/Fasting



Boots of Swiftness - Standar.


These are the best boots for Senna. As an immobile marksman (who can't use Berserker's Greaves effectively), this item offers great defensibility through movement speed. Build these boots as a standar. Rush them if needed because of the botlane matchup, or build it after your mythic.



Plated Steelcaps - Vs. Physical damage or heavy AAs.


These boots are great if built in the correct match, it offers a lot of resistance against AD champions, or auto attackers (example of champions that get countered by these boots: Zed, Viego, Jax, Draven, Pantheon). Build these boots against +3 Heavy AD/Auto attackers. Rush them if needed because of the botlane matchup, or build it after your mythic..



Mercury's Treads - Vs. Magic damage or heavy CC.


[These boots are great if built in the correct match, it offers a lot of resistance against AP champions, or heavy CC (example of champions that get countered by these boots: Mordekaiser, Morgana, Malzahar, Ziggs, Leona). Build these boots against +3 Heavy AP/CC. Rush them if needed because of the botlane matchup, or build it after your mythic.


Wit's End - Insane survivality, cheap and good DPS.


Adapting to the meta, Senna is surprisingly a good Wit's End user. This item is really broken, it grants a lot of hybrid damage, movement speed and basically free magic resist. Build this item as ADC/Fasting when against magic damage (1 AP assassin is enough to consider this item) or if you simply need more DPS after your core items. You can also build this as support as your last item



Rapid Firecannon - Vs. Gap closers or deadly skillshots, special interactions.


This item works really good on Senna. The extra range helps with early survivability and it also helps to proc your Piercing Darkness slow from a long distance. This item shines with Senna's special interaction with it: Q range and hitbox gets bigger (since they scale with AA range), and you can AA+Q combo with one RFC charge (bug? either way it has been here since Senna's release, so almost 0% chance it gets "fixed"). Build this item as ADC/Fasting when you need to keep distance from high burst champions or deadly skillshots (example of champions: Jax, Kha'Zix, Akali, Draven, Blitzcrank.) after your core items (4th or 5th, depending on build and/or match). With the Crit build you want to build this after Kraken Slayer. You can also build this as support as your last item.



Runaan's Hurricane - Vs. Bad engage/all in, special interaction.


This is a really niche item on Senna but, if the match allows it, it can be a really good item. Because of her long range, it's super easy to keep firing bolts and poke the enemy team down before they can fight. This item shines with Senna's special interaction with it: Since bolts counts as AAs, they each reduce Q CD by 1 additional second (up to 3 seconds per auto attack). This helps her to deal a lot of extra damge, as well as healing a lot of extra HP. Build this item as ADC/Fasting when the enemy team doesn't have a reliable way of engaging a teamfight, based on player criteria (example of champions: Illaoi, Karthus, Lucian, Samira, Lulu.) after your core items (4th or 5th, depending on build and/or match). With the Crit build you want to build this after Kraken Slayer. You can also build this as support as your last item.



Lord Dominik's Regards - Early "smurf build" Vs. Armor or Late Vs. Armor.


For early game, this item has really good stats for Senna, but it only offers damage, and since she preffers more survivability/utility after cores, this item is only good when you're really fed and you can end the match by yourself. For the late game, this item really helps with tanks, and armor stackers in general (since the item is kinda busted, a zhonyas is enough to consider an enemy champion as a "armor stacker". last check: 12.15). Avoid building this if you built Black Cleaver, since it decreases the item's efficiency. Build this item as ADC in the early game when you're fed enough against +3 tanks or armor stackers and you know this item will help with finishing the match as fast as possible, right after your cores. Build this item in the late game as Farming/Fasting against +3 tanks and armor stackers, as your 5th item.



Chempunk Chainsword - Vs. Healers.


Standar anti-heal item, for support only. Build this items as Support when you're not building damage and are against at least 1 Healer (example of champions: Dr. Mundo, Viego, Yone, Samira, Soraka.) after your core item(s).



Guardian Angel - 1st option Vs. High AD damage


The standar marksmen defensive item, it helps a lot with AD assassins because of the armor and resurrect passive. Build this item as ADC/Fasting if your biggest threat is an AD champion(s) that keeps 100-0 you, as 5th/6th item depending on the build.



Randuin's omen - More defensive, less aggressive than Guardian Angel.


Pretty self explanatory title. If the enemy team has basically all physical damage assassins, then this item will shine better than Guardian Angel.



Frozen Heart - Randuin's Omen alternative.


Built in the same scenario as Randuin's Omen, but when the active of said item won't help , or the attack speed reduction will have higher impact ( Master Yi for example, he is all about AAs and his R Highlander makes him slow inmune).


Maw of Malmortius - Vs. Magic damage.


Standar defensive item against magic damage. Build it against a team with basically all magic damage or if there's an AP champion that keeps killing you.



Force of nature - More defensive, less aggressive than Maw of Malmortius.


Same scenario as Guardian Angel vs. Randuin's Omen.



Mercurial Scimitar - Vs. Heavy/Undodgeable CC


Standar Marksmen item against Hard/Undodgeable CC. Build this item as ADC/Fasting if the enemy team has a deadly CC (example of champions: Same as Cleanse) as 5th/6th item depending on the build.



Zhonya's Hourglass - 2nd option Vs. High AD damage


This is an alternative to Guardian Angel. It's a little tricky to explain when to take one over the other, but the first thing i would consider is wether i can use the active before i get killed. If the enemy team's AD damage threat is really hard to react (example: Shadow Assassin Kayn), or if they have a lot of CC, i wouldn't recommend Zhonyas. Build this as a late purchase against AD damage if it's possible to use the active before dying.



Vigilant Wardstone - Standar Supp


This is a must buy if you are the support item in your team. It solves the problem of always carrying a pair of Control Wards in your inventory, with nice stats (+ mythic passive). Also, the extra wards passive (in both inventory and map) is extremely valuable. Build this as 6th item in every Supp/Fasting match, you can also build it 5th if you can afford it before your complete situational item (like sitting on a Executioner's Calling while building it.



Elixir of Wrath - Standar.


This is the standar marksman Elixir, it gives a lot of AD, and basically free sustain because you don't need more gold at that point of the match, so that doesn't matter. Buy this item after your full build as a standar.



Elixir of Iron - Additional defense.


This elixir is good if there is still a champion in the enemy team who can kill you like nothing, also the additional tenacity is a nice bonus. Buy this item after your full build if you keep getting one shotted.




Popular items:


Eclipse


Yes, Senna's most popular mythic item in both ADC and Support role is not a viable item under any circumstance, here's why:
  • Senna is not a champion that should build Lifesteal/Vamp. This is because 1, she already has so much built in self peel ( Piercing Darkness' self heal and slow; Curse of the Black Mist's half camouflage; Dawning Shadow's self shield and Absolution's infinite range, extra movement speed, infinite AD that makes Q's healing stronger and free lifesteal in the lategame. And 2, her kit is super slow so she's not fast enough to proc it compared to all other champions. Also, if you really want healing, any other raw AD item will grant you that, as well as extra damage and team peel.
  • Eclipse is a dueling item. The dueling power of the item goes to waste since you have so much range, and you aren't playing for duels either, you just want to poke. The marksmen you see building this item are usually "melee" adcs, like Jhin or Draven, and Senna is of course not this type of marksmen.
  • Duskblade of Draktharr's stats are much better than Eclipse's. Mainly AH over Omnivamp. Senna is a great AH user since her abilities are full of utility for both the team and yourself, and she also has 2 abilities with a lot of cooldown ( Curse of the Black Mist and Dawning Shadow) so AH becomes even better. Also the passive damage of Duskblade of Draktharr is basically the same as Eclipse if not higher than (Duskblade's passive has 1 second less of CD, and it resets on kills). And lastly, a bit niche but the invis from the item is a decent tool to have, since it shines on teamfights, and so does Senna.
So, never buy this item. Seriously, never.



Galeforce


As I explained in the Guinsoo's Rageblade section, Crit Senna doesn't really work without both Kraken Slayer + Guinsoo's Rageblade, so if you buy this, you will deal no damage at all. Never build this item.



Immortal Shieldbow


Same as Galeforce, except that much worse because of the Lifesteal. Never build this item.



Moonstone Renewer + Staff of Flowing Water


You heal for basically the same with any other build, except that you deal almost no damage and gets one shotted. Never buy these items.



Berserker's Greaves


As I explained in the Boots of Swiftness section, you really need the safety of those boots, going for more damage/utility is just greedy. Also, because the Crit build already gives a lot of AS, with these boots kiting will become really awkward to do with Senna's slow AAs. Never build this item.



Ionian Boots of Lucidity


Same as Berserker's Greaves. Never build this item.



Frostfire Gauntlet


This item is no longer a good purchase for Senna, as she already has a consistent slow on her Q, buying another one is not worth it. Never build this item.



Bloodthirster


This item doesn't offer anything else besides sustain, thing that Senna doesn't need. If you feel like you need this item to play her, you should practice a bit more. Never buy this item.



Silvermere Dawn


Mercurial Scimitar is just better. It gives better stats and it has a slightly better active. Never build this item.



Sheen items


Any Sheen item is bad on Senna. They all scale with Base AD, and she's stuck with 50 throughout the whole match, because of her passive. Buying a Sheen item is significantly weaker on Senna compared to every other champion. Never build a Sheen item.


Dead man's plate


Some people build this item as an alternative to Black Cleaver when the enemy team doesn't have enough armor. It looks like a good idea, but the item is generally trash, and it additionally scales with Base AD, same deal as Sheen items. Never buy this item.



Steel Shoulderguards


Some people start with this item in bad matchups, like a normal enchanter should do, but because Senna doesn't want to kill minions because she gets reduced mist spawn chance, buying this item weakens Senna as a whole. Never build this item.



Support Crit Build


The build is crazy expensive, expect to start dealing damage at +25 minutes into the match, and most matches are already decided by that point. Also, your team does not need another squishy DPS carry. Never go for this build.



Divine Sunderer


In this patch (12.13) Divine Sunderer was changed so it scales with Base AD, and how I explained in the Sheen section, Senna has terrible bsae AD, that does not increase with level. I know that the Sheen section should naturally include Sunderer already, but i wanted to make a distinction since before this patch it could be built because of its different scaling. Never build this item.



Support Manamune


As i've noted in quite a lot of other chapters, Senna does not need Manamune's high mana because the support item already gives enough of it. If you build it because of the high AD, you're better with something like Umbral Glaive or Serpent's Fang. Never go for this item as support
Item sets
Here is all my item sets to make your life easier on the rift! :D (Note: Most active items are set to a specific key that i personally use; you'll have to manually change it to the keys that you most like, or fully unbind them.)

Farming Crit


Click Here



Fasting Crit


Click Here



Farming Lethality

Click Here



Support Lethality


Click Here



Support Warden


Click Here



Fasting Lethality


Click Here
Early game

General tips


At the start of the match, do not stay for the Mist after leashing your jungler, unless they clear insanely fast, like a 3 box shaco.

After backing, if you find your jungle clearing Gromp (red side) or Krugs (blue side) you can go near them to get free mists.

If you start fighting a 2v2, always try to hit all 3 champions with your Q to get the most value out of it.

You can kill a low HP minion with W to root enemies close to it to make an unexpected engage

You can use E to help your jungler gank (or your midlaner if they roam) for an easy and deadly surprise to the enemy botlane.

You can also use E if your botlane partner is coming to the lane after they backed to hide them and opening up an easy engage.

A tricky thing you can do with E is to approach the enemy botlane alone to scare them into thinking you have an ally with you, so they're forced to retreat. You can use this to get some farm or to regain control of the lane while your botlane partner is not present.

Farming/ADC


Your early game is generally bad, but it's super safe because of your range and self-peel. Your objective in this time of the match is to use your range to safely farm, or to poke down the enemy botlane whenever possible. Your safest way to poke as ADC is to Q a minion (ally or enemy) to hit an enemy out of range, to then follow up with an easy AA because of the slow and Approach Velocity.

Fasting and Support


Your early game is quite decent, but you can really struggle against counter picks. Your main objective in this time of the match is to poke, poke and poke. Poke whenever you can to get tons of mists and gold. Constantly harass the enemy ADC when they try to last hit a minion. Your Q is really powerful when trading, you can force an AA trade with the enemy ADC, then using your Q to heal his damage, while dealing a bit more to them. As Fasting Senna you can take 1-2 melee minions per wave additonally for the best gold-mist balance. You can also use the Q+AA combo in hard matchups to get an easy mist out of range.
For Support only, you also want to roam, but less compared to any support, since Senna likes to stay just a bit more on lane because of her Mists. I usually roam when:
  • I'm in base and my ADC is dead/gone, i'll just walk to another lane or river.
  • An objective is up and my jungler wants to contest, either herald or drake i'll be there.
  • I'm in botlane and i can't gain vaule from anywhere there because of an enemy freeze or similar, i'll walk to midlane, or if it doesn't look gankable, i'll go deep ward the enemy jungle.
Mid game

General tips


Senna's mid game has a little problem: since the laning phase is over, there is no way of getting consistent Mists per Minute. The map below shows places where you can be to get mists from both the camp and the wave if it's crashing near the spot. Blue and Red are the colors of the team, but you can use the opposite if the map has enough pressure. Yellow dots are places where you can get mists from multiple camps if allies are clearing them, not really dependant of waves.

It might sound like niche information, but i assure you, it happens a lot more than you probably think.


Besides the mists issues, Senna has a solid mid game because you already have a decent range to be a scary threat, and also because of your big impact in objective teamfights and skirmishes.

Farming/ADC


Your midgame should be strong, with Kraken+Guinsoo you deal quite a lot of damage from a safe distance. Your main objective in this time of the match is to set up lanes for Dragon or Herald, without risking your life. Don't overextend to push one more wave, your team will probably lose the objective fight without you. Also remember to ward, it's not only the support's job.
With the Lethality build this is your strongest point (besides hyper late game), but in a different way. You're not that good in skirmishes and teamfights because your DPS is not that high, but what you can do is harass the enemies in-betweem fights with your spells without having to commit, since you have better burst damage than the crit build, so that they can never enter a fight at full health. Use the same tricks of poking in the early game to damage the opponent over and over again when they go to push a lane, or when you find them in the jungle.

Support and Fasting


Your midgame should be strong, whatever build you're using, with the amount of mists that you have collected, you're super strong in healing and dealing DPS from a safe distance. Your main objetive in this time of the match is to set up wards and clearing enemy wards arround river and the Dragon/Baron pit when they're about to spawn. You can also help other laners to push lanes faster or to win map priority. If needed, you can back to get pinks and reset your support item, it doesn't matter if you don't have anything else to buy. try to avoid being in a lane by your own, you can die pretty easily.
Read the ADC/Farming last bit to understand more what you have to do in the Mid game when you play with the Lethality build when Fasting.
Late game

General tips


Your late game is awesome, so much damage, so much healing, so much RANGE. You're a monster, and you should play like one. And no, i'm not saying you go all-in 1v5, just play safe like any other ADC, keep your distance of assassins and any close range threat, and keep yourself alive for as long as you can, while dealing insane DPS.

Farming/ADC, Fasting and Support


Same as Mid Game, but with a much stronger teamfight potential, if you die by overextending or poor warding, your team will lose the most important champion of the match, and will probably lose the game. Don't get excited for beign a damage monster, you're still a piece of paper, and everyone wants to shut you down.
With the Lethality build you're not that much of a monster, you're damage will fall off considerably in teamfights. Poke as much as you can in-between fights to get an advantage, but it's going to be a lot harder compared to mid-game.
Last bit of info and Conclusion
phew, that was a ride, i swear i could talk about this champion for hours. In fact, this guide was started in January (2021), i had a couple issues with coding at the start, and a couple of breaks in between, but it's still a lot of time, i really feel like i said everything that i know.

JK! here is a list of quick minor information
  • True Damage Senna and Prestige Lunar Eclipse Senna both grant a small advanatage: The mists on the ground will drastically change colors when about to expire.
  • Avoid building defensive items ( Guardian Angel, Mercurial Scimitar or Maw of Malmortius) as support, since they're really expensive and a selfish way of spending gold. Also you aren't really the main target in teamfights.
  • Using E to return to lane faster is generally a bad idea because of the long cooldown.
  • Always start with Q when hitting towers, you will have more DPS that way.
  • When using Q in a tower, try to line up with other teammates to heal them.
  • Using Q to pick an out-of-range mist on the ground in bad matchups is worth.
  • Allies and enemies can dodge your Q if they're fast enough or if they use a mobility spell.

Ok, now i think that's everything i know. Feel free to discuss anything you disagree in the comments, and one of us will learn something about it. Also remember to vote if you enjoyed the guide :D

by the way, the Youtube and Twitch links is for when i start making content, i still haven't done anything. Just remember that i might stream in spanish (my main language), sorry about that :(

Bye!~ ^^

League of Legends Champions:

Teamfight Tactics Guide