I was fighting a sylas earlier today as Fiora, and whenever I almost get him he clicks one button and hes full health. Steals my ultimate, and executes me. Kingslayer has WAY TO MUCH LIFESTEAL! It should be only an execute, like nidalee cougar form Q. Maybe just less lifesteal. Either way the current form of W is not okay
I think there's something noble about a Fiora player complaining about another champion healing too much and that it's frustrating.
Because many people have the same opinion against Fiora, too. How does tasting your medicine feel, my man?
That said, try 
and other sources of Grievous Wounds. Much like how all of the others have to do to put up with Fiora's sustain all this time.
........
Still, I do also agree that his W is probably a bit overloaded given it has both execution and leech and both are at very good stats. Maybe nerf the scaling of W's leech or something.
Sylas is overloaded. He's like an ap pike it's obnoxious. Nerf like pike.
It's way better than lifesteal, since the healing is frontloaded after pressing one button, and is percentage based instead of a flat amount.
Why does he get a gap closer that increases his damage against low HP targets AND heals him? Many champions are lucky to get one of those, that's not even taking into account the rest of his kit.
He's more mobile than half the melee champions in this game, while also having more mitigation, more sustain, and is a decent duelist. To make things worse, he scales with AP, making it much easier to simultaneously build defense, damage, and CDR without sacrificing anything like an AD bruiser does. This champion is beyond busted. I don't complain about specific champions too often but this is beyond ridiculous.
Trundle's nerfs could all be reverted and he still wouldn't be half as strong as Sylas is currently.
