Heal for a percentage of damage dealt with your abilities. Increases with each unique takedown.
As Aatrox, you are able to reliable and repeatedly lane Arcane Comet with constant successful use of [Q] for empowered lane harassment damage.
Nimbus Cloak on Aatrox allows you to chase down and stick to an enemy after using [R] to either kill the target or escape.
Aatrox heavily relies on [Q] for successful damage output and the additional CDR from Transcendence is excellent for increasing you damage output.
Scorch furthers your lane harassment damage by allowing you to easily proc it with [Q] from range on cooldown.
Sudden Impact is a reliable form of additional Lethality when combined with [E] and the extra AD it provides.
A large portion of Aatrox's damage comes from the use of abilities, mostly [Q], allows Ravenous Hunter to provide you a consider amount of damage sustain in fights when combined with the Health Steal from [E].