Aatrox Rework Concept

This is my concept for an Aatrox rework.

Passive: Blood Dance On hit Aatrox applies a stack of Blood Dance caping at 5 stacks for each stack Aatrox deals 1% increased damage to that champion and receives 1% reduced damage from that champion. When a champion dies with 5 stacks of his passive Aatrox goes into a Darkin state and applies 5 stacks of his passive to champions he autos for the next 4 seconds. Targets not damaged by Aatrox for 2 seconds lose stacks at a rate of 1 per .75 seconds.

Q: Dark Dance Aatrox dashes in a target direction and slashes in a cone in front of him, for a few seconds after first cast can be cast again. Applies on-hit effects.

W: Blood Thirst Aatrox heals himself on-hit. While Aatrox is below 50% maximum health, heal is doubled. Life steal items are half as effective on Aatrox.

E: Same but slow starts at 20% leveling up to 80%

R: Spoils of War Aatrox ult cannot be leveled all of his abilities gain and extra level. When a champion dies with Aatrox's passive on them, Aatrox gain 1AD and 1 in combat movement speed for the first stack for each stack after the first he gains .5AD and .5 in combat movement speed(this counts each stack of his passive on a champion so he can gain a max of 5 stacks from a kill). In combat movement speed falls off after leaving combat for 3 seconds. Every 50 stacks of Spoils of War grant Aatrox an extra dash on his Dark Dance.

I think this kit goes better with his lore that the longer he's in combat the stronger he gets, and that he feeds off of the energy of war. This is just a rough concept but if people like i can go into more detail on like the damage numbers and what not.