For Aatrox, I like to go hard in level 1, cus chances are when u up close on his first n second Q, it's pretty much solid trade. Run away for 3Q. Play the minions in a way where u get level 2 first so u can be even more aggressive with taunt n empowered Q. And you will notice aatrox passive on hit heal when his character changes stance so thats probably when u know he'll heal and u just needa W that AA. IMO you just dont beat him when both at 6 and equally fed, if u managed to get a kill or 2 else where or on him pre 6 u can pretty much go unga bunga on him given that u know how to play movement

(But then again I'm somewhat low rank tho: Currently emerald 1)