Thank you for the answer.
We most likely raise the turn with our non_nut flushes and boats in his eyes, and we call 55-77 only with flushdraw, so our turn calling range looks like
{TT-99, 7d7s, 7h7s, 7s7c, 6d6s, 6h6s, 6s6c, 5d5s, 5h5s, 5s5c, AsQs, AsJs, AsTs, As7s, As6s, As5s, AsQh, AsJh, AsTh} - total 27 combos on the river 9s.
There we will call with :
{TdTs, ThTs, TsTc, 9d9h, 9d9c, 9h9c, AsQs, AsJs, AsTs, As7s, As6s, As5s, AsQh, AsJh, AsTh} - total 15 combos, which means he has 43% fold equity, which makes his bet +EV.
Ofcourse i might be wrong with my assumptions, but i think it's okay to make wrong assumptions.
Ofcourse2, it's impossible for villain to calculate this at the table and he may or may not betting the river, given his overall estimations in real time.
So if there is a chance he thinks, that we can slowplaying the nuts on the turn, we can expect him to not bluff his whole bluffing range on the river.
That depends on our overall observations for 200nl regs, so this spot seems to be superclose on the river, i think.
My standart play there is to check/call, because most ppl thinks that they can bluff this board without showdown value, because he knows we have some random % of our range, which we gonna fold.
Sorry about wasting your time, i appreciate your posts. 