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Senna Build Guide by TheMistCollector

ADC 900K 11.22 SENNA ULTIMATE GUIDE - FASTING, FARMING AND SUPP

ADC 900K 11.22 SENNA ULTIMATE GUIDE - FASTING, FARMING AND SUPP

Updated on November 3, 2021
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League of Legends Build Guide Author TheMistCollector Build Guide By TheMistCollector 147 14 226,474 Views 14 Comments
147 14 226,474 Views 14 Comments
League of Legends Build Guide Author TheMistCollector Senna Build Guide By TheMistCollector Updated on November 3, 2021
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Runes: GLACIAL LETHALITY/CRIT/WARDEN/TANK

1 2
Inspiration
Glacial Augment
Magical Footwear
Biscuit Delivery
Approach Velocity

Precision
Presence of Mind
Legend: Alacrity
Bonus:

+9 Adaptive (5.4 AD or 9 AP)
+9 Adaptive (5.4 AD or 9 AP)
+6 Armor

Spells:

1 2 3 4
Default
LoL Summoner Spell: Flash

Flash

LoL Summoner Spell: Heal

Heal

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Support Role
Ranked #26 in
Support Role
Win 49%
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Support Role Ranked #26 in
Support Role
Win 49%
More Senna Runes
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Items

IMPORTANT NOTE; READ

Threats & Synergies

Threats Synergies
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None Low Ok Strong Ideal
Extreme Threats
Ideal Synergies
Synergies
Ideal Strong Ok Low None

Champion Build Guide

900K 11.22 SENNA ULTIMATE GUIDE - FASTING, FARMING AND 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). I know, it's not such a good elo, 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 at 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
  • Terrible when counterpicked
  • Awkward AAs with low practice
  • DuoQ reliant when fasting
Runes
In this chapter i will talk about the 2 standar runes for Senna, as well as some other popular (but not necessarily good) ones.

Main builds:


Glacial Lethality/Crit/Warden Senna:


Glacial augment: This is the number 1 keystone on Lethality/Crit/Warden Senna (both farming and fasting). it helps her to collect mists from enemy champions in the early game, and has great synergy in the late game when you have a lot of range. It can also lead to an easy Last Embrace

Magical footwear: Amazing rune overall, it has great value in terms of gold. Additionally, the other options are really bad.

Biscuit delivery: This rune helps Senna with early sustain, wich means she can stay in lane for longer, wich leads to more mists. The extra mana cap helps her dealing more damage with Manamune (farming only).

Approach velocity: This rune helps Senna the same way Glacial Augment does, getting on top of enemy champions. It gives her 15% MS when she procs it, and Senna's AAs already gives her MS, so after hitting an auto attack to an enemy champion (with Glacial augment), the mist is almost guaranteed. It also procs when rooting with Last Embrace.

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.

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.


Grasp Tank Senna:


Grasp of the undying: This is the best and only keystone for Tank Senna. Thanks to Senna's range, it's super easy to proc everyime it's avaliable. It also grants you access to the Resolve tree, wich will help you beign a healing monster while also being hard to kill. Don't expect to deal a lot of damage with this build.

Font of life: This rune synergizes so good with Senna, Frostfire Gauntlet and Revitalize. it procs on soft CC so you are going to heal a lot with this.

Bone plating: This rune allows you to survive almost any burst with Frostfire Gauntlet. You are going to surprise every assassin when they go all in on you and deal no damage. you can go Second Wind if you are in a bad matchup.

Second wind: This rune is really good against poke matchups, it allows you to survive laning phase much more easily.

Revitalize: This rune allows Senna to be a healing monster while also being more tanky herself. Revitalize, Font of Life and this rune make such a perfect combo. Expect getting +800 healing per teamfight.

Presence of mind: This rune is great for Senna. Spectral Sickle and this rune helps her with the issue of having enchanter ability mana costs instead of tradicional ADC ones. It also makes poking even more valuable because it grants Mana regen.

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:


Fleet footwork: At first look this rune looks good actually, but then, you realize that this rune offers self-sustain and movement speed per a couple auto attakcs, things that Senna doesn't need at all. If you can't play without this rune, you should practice this champion a bit more.

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.

Cut down: At first this rune looks super good, because Senna has really low HP, meaning that this rune could be used at max potential. But then you look at what items you want to be building against tanks, and they give you a lot of HP ( Divine Sunderer gives 400 HP and Black Cleaver gives 300 HP. don't even mention Grasp Tank build). Additionally, Presence of Mind and Legend: Alacrity synergizes so good with Senna that is not worth dropping them. So this rune is also not worth using, ever.

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. Also, not going Glacial Augment without building something to replace it is really bad. 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: This rune is usually used as a secondary alongside Cheap Shot with Glacial Augment as the keystone. 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 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.

Cosmic insight: This rune is meant to mitigate some of the multiple nerfs to Eclipse's cooldown. The idea is good, but since Eclipse is no longer a mythic option, it's not necessary.

Manaflow band: Some people used this rune because Presence of Mind no longer grants max mana, but since the Manamune lethality build is no longer the best, it doesn't really matter anymore. Besides, PoM's absoulute mana is still higher than Manaflow band.
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 50 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:

  • 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.

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.

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.

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 Glacial Augment and Approach Velocity, or Frostfire Gauntlet to its full potential by using Q in 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 Glacial Augment / Frostfire Gauntlet 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 Glacial Augment / Frostfire Gauntlet 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 with Glacial Augment or Frostfire Gauntlet 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
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 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 as your first item every match as Farming or Support, and after boots if 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 your mythic item every match when playing ADC.



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 item right after boots every match when playing as Support



Youmuu's Ghostblade - Standar Lethality


The new buffs makes this item a better 1 item powerspike than Duskblade of Draktharr in both gold and effectiveness. The reason we don't rush it as Farming is because we need Manamune instead. Build this item as your first one when playing Fasting.

Situational items:

Black Cleaver - Vs. Tanks, 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 to enemy tanks. Build this item against +3 Tanks right after your mythic when playing ADC.


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/Fasting 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 or 5th, depending on build and/or match).


Youmuu's Ghostblade - Standar Lethality


This item can also be built after your cores if you only want more damage. Build this item right after your cores if you only need more damage when Farming.



Serpent's Fang - Vs. Heavy shields.


This item is a great option if the enemy team has a lot of shielding (example of champions: Sett, Ekko, Rumble, Kai'Sa, Lulu). Remember to consider if the enemy champions can build items such as Sterak's Gage, Gargoyle Stoneplate or Immortal Shieldbow. This item also provide really solid damage stats. Build this item right after your mythic against +3 Shielders as ADC, always considering the last named items.




Tank Support Build:


Core items:

Frostfire Gauntlet - High HP, slow passive



This item is AMAZING with Grasp of the Undying and Font of Life. It has a lot of HP wich helps with stronger FoL procs, and the slow passive makes proccing the rune more easy, and it also works as a replacement for Glacial Augment when collecting mists from enemy champions. Even if you're paying 1100 gold for an useless item ( Bami's Cinder), the slow passive and the amount of safety it provides while healing for basically the same as a full damage build makes this item 110% worth. Build this item after boots 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 Frostfire Gauntlet on every match.




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, wich 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 Mortal Reminder was built early on.




Tank Carry Build:


Core items:

Divine Sunderer - Tankiness and damage.



This item helps a lot if you want to survive longer, while not falling off in damage, the components are not that great, but when you finish the item, you will feel the additional tankiness, while still dealing a fair amount of damage. Build this after Wit's End if farming, or after boots if fasting every match.



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 your mythic item every match if farming, don't build it if fasting.





Situational items:

Randuin's Omen - Vs. managable AD Assassins

Although this item is meant to counter crit champions, its stats and active makes this a great anti assassin item. The active helps to kite back when an assassin is in your face, after surviving their full combo because of the stats. This item is also surprisingly cheap. Build this after your core items against AD assassins.



Frozen Heart - Vs. unmanagable AD Assassins or more agressive tankiness

This item can be used against champions like Master Yi, Olaf or Zed who doesn't get affected at all by Randuin's Omen's active, or it can be build against any assassin if you also want extra offensive stats, because of Muramana's Awe passive. Build this after your core items against AD assassins that will ignore Randuin's Omen's slow or against any assassin if you want extra AD.



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 playing with Grasp of the Undying, or build it after your core items if playing with Glacial Augment (second or third depending on the build).



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 playing with Grasp of the Undying, or build it after your core items if playing with Glacial Augment (second or third depending on the build).



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 playing with Grasp of the Undying, or build it after your core items if playing with Glacial Augment (second or third depending on the build).


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 (4th or 5th, depending on build and/or match).



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


This item works really good on Senna. The extra range helps with early survivability and it also helps to proc Glacial Augment 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).



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).



The Collector - "Smurf build" Vs. Squishies


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. Build this item as ADC when you're fed enough against squishy champions and you know this item will help with finishing the match as fast as possible, right after your cores.



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: 11.22). 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/Supp against +3 tanks and armor stackers, as your 5th item.


Serylda's Grudge - Vs. Tanks. if you have a lot of HP


Since you have so much HP, building Lord Dominik's Regards is not the best idea, so this is your best item if you need armor penetration. Avoid building this if you built Black Cleaver, since it decreases the item's efficiencyBuild this item against +3 tanks if you have a lot of extra HP after your cores, in no particular order.



Mortal Reminder - Vs. Healers.


This is the standar marksmen item against heavy healers, avoid building it if your team has better champions to apply Grievous Wounds, like a mage with Oblivion Orb / Morellonomicon. Build this item as ADC/Fasting/Supp against +3 Healers (example of champions: Dr. Mundo, Viego, Yone, Samira, Soraka.) as your 5th item.



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. Build this item as ADC/Fasting/Supp, if you don't need any situational items, as your 5th item.



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.



Death's Dance - If Guardian Angel is on CD.


Pretty self explanatory title, if your Guardian Angel is on CD, sell it and buy this untill it recharges again.



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/Fasting.


This is a must buy if you have 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:


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.



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.



Eclipse


You're spending a big portion of your money in useless sustain. Also, the damage passive is simply worse than Duskblade of Draktharr. Never buy 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.



Chempunk Chainsword


This item, compared to Mortal Reminder, is really weak. It gives worse stats, it's more expensive, and the passive is harder to proc. There is no reason to buy this when Mortal Reminder exists. Never build this item.



Sheen items


Any Sheen item, except Divine Sunderer, 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, except for Divine Sunderer.


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.



Support Sunderer Build


This build is not worth at all. Just because Senna has been able to build tank as support before, doesn't mean that any tanky item is good. Every Tank Support build has existed because they can both make you tanky and support your team effectively ( Frozen Mallet and Frostfire Gauntlet's slows and high HP to make the ultimate synergy with Font of Life. Locket of the Iron Solari for the resistances aura and AoE shield). Sunderer doesn't have any supportive capability besides a little AD, it's just selfish tankiness. Never go for this build



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: Outdated item sets are tagged as a Thresh build, this is my personal way of tracking wich builds are better atm, and to not get flooded in-game with a lot of builds that i'm not going to use, so in order to see it on a Senna match, you need to manually change it. Also, 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



Support Tank


Click Here



Farming Tank


Click Here



Fasting Lethality


Click Here



Fasting Tank


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 Glacial Augment 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
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 Mist 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.

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.
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.
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, 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
  • If building manamune, you can start the match with tear, Q an ally champion for free stacks, and refund for a DBlade. This forces you to level up Q as soon as the match starts, so don't do this if you have strong level 1 champions (possible invade)
  • 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