Not that I know anything about play at this level but if hes so aggro isnt it better to wait until you hit an out and then let him play at you when hes drawing dead? (I mean before you bet out. Obviously this doesnt apply after its raised and reraised.)

Also a slight hijack. You say he lost 200BBs with a KK overpair. I assume you are implying that was a mistake but wouldnt it usually be a mistake to fold something so close to the top of his range when you play back at him, assuming he knows his own image?
I would have thought if hes getting it in with A high/bottom pair alot then he should pretty much never fold an overpair.