Alternate Sivir Build
Ever since I've changed my build from the classic ADC build on Sivir, to the next listed, I've noticed two things. My ratio is higher, my CS is higher, my win rate is higher... and my team always tells me my build is bad and teleport is bad
Sums -> Tp + Flash Runes -> AD Quint, Arp mark, Armor Seal, cdr blue Masteries -> 19/0/11 (cdr not AS side), LS/SV util x3
Build: Dorans -> Essence Reaver + Lucidity Boots -> Brutalizer -> Last Whisper -> Black Cleaver -> Banshees -> Shiv (take avarice blade when convenient)
This has a ton going for it that is extremely champ specific and would only ever work on Sivir, and prioritizes CDR over AS (this will make her play differently than a typical adc) at 40% CDR you will almost always have ricochet up, which makes up for AS and improves poke/clear speed/armor shred)
Dorans start to make up for weak early game and lack of LS runes.
Essence reaver because CDR, basic life steal, and massive AD are really incredible beneficial to kick this build off, the mana gain is more a bonus for late game sieges and high cdr spam.
Brutalizer and lucidity will cap your CDR, at this point your armor pen will suddenly become extremely noticeable and it is important to rush LW because they will be matching your ARp pace with armor, you will wind up far ahead of them though.
Banshees for super powerful double spell shield (if you get caught off guard)
Statik shiv is a cap stone to further emphasize ricochet, your clear speed and AoE poke is pretty much unparalleled.
Summarized
Pros
45 Sec CD ult 7 Sec Spell shield CD (and redundancy) AoE Armor shred, and extreme penetration (so you will continue slicing through tanks and late game minions) The ability to start split pushes, and end enemy split pushes quickly and efficiently Endless Sustain Constant Ricochet (so constant AS/Damage boost/AoE attack) Boomerang spam on ~4.5 secs You siege like a badass You teamplay like bOse You will never be forced to rely on AA and position to hit the back line to do damage, you throw your boomerang and make sure to land your three ricochets on ANYONE peel off and repeat.
Cons
You might lose lane by kills (heal > tp for kills) but you should make up gold with easy clear and tp You will never have crit bombs You will never be able to 1v1 the enemy ADC in a head to head battle, you have to MOVE, you have to POKE always, ALWAYS. Your AA will be lacking, this cannot be played like a cait/graves/lucian type.
Feel free to check my history, but keep in mind you have to check normals, because I only started playing it in ranked recently, and you can see the massive success I suddenly began to have when I switched builds.
A Final Note, I adapted into this build because I am bad at successful aggressive ADC AA, but awesome at poking... which means that I was never great as an ADC but very good at mid. This solved my AA/Positioning Woes and provided an extremely safe way to dish out damage from the ADC Role that is unhindered by the re occurrence of tanky meta and cc.