"R we losing build?0" tends to aim to long term full utility, for example as its written on the guide, u can change mortal reminder to Black Cleaver, but aiming more to a long term build HP and CDR on chemtech chainsword makes it usefull.

U can make ur own build based on this, Serpent's fang its a very situational item that u must not use unless u need it, (by that i mean that there are way better items than serpents fang, but serpents fang by itself has very good relation stats-cost), sadly meta always changes so i cant tell u not to always do or do not.

since while r playing senna u dont need to stick to a stat based build like "only AD utility build" or something like that, cuz what the aim is, is to be usefull, moonstone renewer may no be the same item it was on its release, yet is a good item to put onto that build,

It'll depend strongly to ur aim, and utility, cuz budget is also important,

imagine ur team is behind, being supp and losing is an economy hell, the main bbuild u see on the guide that is "R we losing?" its budget friendly and useful,

being said that, ill offer u builds i would use

moonstone renewer + axiomatic arc + serpents fang/edge of night (a bit more lethality to improve axiomatic arc) + BOOTS OF SWIFTNESS/PLATED STEELCAPS + chemtech item to get deep wounds + black cleaver

edge of night + axiomatic arc + serpents fang + boots + umbral glaive + rapid firecannon

edge of night + chemtech item + moonstone + ardent censer + boots + another ap supp item (redemption may be nice)

im pretty sure ull get by yourself how to succesfully conjugate by urself this builds and im sorry if i didnt offer u the answer u was looking for, i can take a bit more time later to offer a better answer, also i need to make some changes on the guide

yuntals offers u the chancee to deal a bit extra damage at early stages of the game thanks to crit scalation of sennas passive, if u r performing decently or goodly on tha match itll help u to stay ahead on trades

Hi! I would like to invite you to up vote or down vote this guide, and reply as many times you like, I’ll try to take time to answer XD


Summary:

Building lethality it’s nice, but rn very situational
Most lethality items with utility passives seems to be better for senna than damage passives
Axiom Arc rocks!
Sure sell your item, but be careful, not always a good idea
Blood song doesn’t scale with you, it sucks

Content:

Well,choosing builds, certainly half builds here make senna bruiser/tank ish, while the “optimal” way to build her is on lethality, but here’s the thing, while building lethality having strong enemy tanks ur utility goes down, you can still build lethality to help get down other players, like bot lane champs, but Lethality build makes you squishy, hella easy to kill, having an enemy assassin or mage looking up to you will make you completely useless. On this actual meta most of enemy champs will kill you before you can kill em, based on that my way of thinking is: dead senna doesn’t collect souls, doesn’t deal damage and has no utility, that’s why half builds in this guide give senna Hp.

Axiom arc is a really good item, considering that most of the times you will get assist, or the kill, (here’s where considering Hubris is also a good idea) this item helps you have sooner ur R, which has an annoyingly long cd. And, the other lethality items, while they can work on senna, they are not really worth buying,I don’t remember their names, but I’ll check em later, so lethality vision item it’s indeed a nice option, but its range is short and at late game get to basically face check in bushes to get down wards can get you dead, while senna attacks kinda fast so you don’t really need the 2 damage on wards passive, the lethality energized attack that gives you 100 ad on hit it’s also a good option, but you don’t lack of damage since min 12 to be buying this item since others can help you more, like edge of night, this item may be underestimated, gives you ad, lethality and HP while its passive helps you not to get bursted by a mage, like most of times you’ll be dead by eating an Cc ability, so having senna’s range, good boots and positioning, even if they land that ability that passive saves you
Serylda’s grudge, I used to be a fan of this item, it’s still good, the utility it’s its passive, it’s not game changing, but it’s ok, armor penetration and slowing ppl more it’s good for everyone.

Selling your support item, there’ll be ppl that tell you yes or not, I’ll say that depends on enemy comp and how’s your performance on that game, if you r shinning, like without you they can’t kill enemy carry or something like that, BUT remember that after midgame, this items will help you to get vision on important game changing objectives, and at that part of the game almost everyone will be finishing their builds not having space to have red wards. Also, if they have an important split pusher like tryndamere or yorick it’ll be a good idea to be putting vision on side lanes, or if they got an annoying assassin like rengar, blue Kayn, shaco, etc, the more vision ur team have, the more chances not be bursted on surprise. AND remember that it helps you to land Qs, not big deal but it helps and it’s nice.
You may know more than half of this info, yet I would like to remember you, while your job is dealing damage, being supp means to be controlling vision and being useful for your team.

Last part of all of this, Bloodsong, I’ll straight say, no, if you want it go on, but remember that bloodsong damage parts from Shine, and shine deals damage scaling with Base damage, but senna it’s the only champion that doesn’t get ad on lvl, so the whole game it’ll deal 100% base ad = 50, plus 5% more damage, the only recoverable part of this 5% more damage during 6 seconds, but still bad.
If we do some math, just to say a number let’s say 600, if you r doing 600 ad on AA, and you get blood song it’ll be (600 + 50) x 1.05 = 682.5, it means that blood song will help you on 82.5 damage of that part, let’s scale it a bit more, (1000 + 50)x1.05 = 1,102.5, at that part of the game it’ll be dealing 102.5 ad, then let’s see Solstice sleigh gives you 50-230 hp and 20% decaying ms to an ally and you with 30 seconds cd, it’s activated by immobilizing (W) or slowing (Q); from early to late game let’s compare utility, one will give you 50 + 5% damage from all sources or 50-230hp + 20% ms x 2 (cuz u and an ally are having this), OR celestial opposition, reduces incoming damage by %25 and by 2 seconds after being activated and slows enemies by 60%.

Solstice Sleigh will give a nice HP + MS bonus
Celestial Opposition gives 25% damage reductions and slows
Blood song gives 50 + 5%

Let’s look down on bloodsong

80 souls at 30 mins maybe its not the best amount you can aim to, but it does is the average-minimu m acceptable. Aiming to at least 8 souls per minute its hard near impossible if you get to know enough about senna, aiming to at least 4-5 souls per minute its an averga good amount, aiming to get, on average good situation, 80 souls at min 20, meaning to get an average of 4 souls per minute. Aiming to get 8-10/min means you wanna have 160-200 souls at min 20 and, at least for my own self, its not possible.

But its a good observation you gave, ill change later that 80 souls at 30 mins.

Ill welcome you to offer more tips and corrections to my guide.

Good luck on the rift.