Aatrox is a very good champ to farm and clear jungle camps. You will find it easy to farm the wolf camp and the raptor camp and not too difficcult to farm the others. What you will realize though, is that Aatrox isn't a very good champ to early gank, unless your teammate does all the damage, so avoid early ganks unless you have a very strong early champ on the lane you want to gank.
In the mid game, however, he has a very good clear on all camps, and lots of ways to gank and punish the enemy opponnent with the airbornes of his Q The Darkin Blade.

I AM CRAZY
With this build, aatrox finds it more difficcult to farm crowded camps because of his lack of damage on his Q's, but it's normal. This build is to 1v1, but with Ravenous Hydra you will do some AOE dmg.