The Aatrox build for Top is Goredrinker and Conqueror. This LoL Aatrox guide for Top at Platinum+ on 13.24 includes runes, items, skill order, and counters.
Aatrox Counters
51.1%
(-0.1%)
58.1%
(-1.8%)
10.7%
(+0.6%)
13.0%
(-2.5%)
781
(-13)