You'd probably want to get it in on the flop with all ur nut hands including AK, by calling the 2bet and sticking out this 1/2pot turn bet its not really repping anything half decent IMO.

If you want to counter just 3b flop. I don't really see the merit in bluffing this guy in a sport where I think really you have no clue what he has - you just fancied playing back.