As per usual, no reads.

check/fold doesn't seem too bad. It's hard to imagine him valuebetting a hand you beat on this board, and there aren't many hands he's bluffing with after calling you on the flop/turn.

i don't think he's calling the turn to bluff unless he's calling with AA or KK on all streets possible but unlikely i guess block betting isn't your style otherwise I would throw one out about 1/3-1/4 of the pot and fold to a push

I think his hand range is AA/KK/AQ/KQ as well as as bunch of SCs with diamonds, 78d, 79d, maybe a weakly played 67d. He could also have 9T.

I don't think he bets the river like ever with AA/KK/AQ/KQ, especially given your tricky image and the possibility you're checking with a big hand. The board is just too scary to bet with a one-pair hand given your range includes lots of 2-pair hands or sets which you'll call with (or so he thinks), and I don't think he's thinking a level deeper than that.

I would probably call a shitty river bet up to $150 or so, but anything more looks to me like a flush/straight hoping to get paid off by a hand exactly like you have.

not saying it's the way to go.. but what do you think about $200 blocker/value bet and fold to a raise? even if he has a king he has to be afraid to raise that river.

Didn't you consider a check-raise on flop or turn? With your hand and this board you want to put as much money into the pot as possible before the river, and a check raise allows you to do that without overbetting.

As played I would alternate between a block-value bet of about 200, that AQ could call, and a check-fold. (With frequencies like 50:50)

shove river.

villian has AQ, KK, AA here most of the time.

and you obviously cant value/blocking bet and fold to a raise due to pot odds.
If u check, you pretty much have to check-call due to the amount of money u put in on the turn while ahead of the flush draw. And if ur opponent has the flush hes putting it all in anyway if u check to him. If u check your losing value from AQ KK or AA if he decides to check behind. If you push river there may be be a % chance he calls with those 3 hands. So checking with the intention of check-calling is stupid, cuz villians only gonna bet river if ur behind. So just put it all in and hope he calls with his KK or whatever he has.