If he is opening 55%, id be defending extremely wide.. And this hand would be very very up the top of my range, no way i could fold this.. He could even have worst Ax.. And thats enough to make this a call..

Text results appended to pokerstove.txt   1,109,572,992  games     0.001 secs     1,109,572,992,000  games/secBoard: Dead:   equity win tie      pots won pots tied

Hand 0: 42.941%    40.75% 02.19%     452120009 24344929.00   { 33+, A2s+, K2s+, Q2s+, J3s+, T5s+, 95s+, 85s+, 75s+, 65s, A2o+, K4o+, Q6o+, J7o+, T7o+, 98o, 87o }

Hand 1: 57.059%    54.86% 02.19%     608763125 24344929.00   { Ac9s }

equity-wise A9o is dominating VIllains BvsB opening range, and the fact we're IP, further justifies a call. 

Given his flop/turn/river c-betting stats, I think it's an easy 3-street call to bluffcatch line, given you hit the top of your range on Turn-street. River should be an easy call.

ye totally agree, do we call A2 here as well ?

anyone thought that maybe is better to have A6 than A9 because we block some his straight draws? It'd be interesting to simulate this in crev to see whats the EV of bluffcatching w different Ax

I guess there is no real difference between A2 and A9 here beside that OP is beating A8 as well which is only about 12 combos of villains whole range