Very interesting spot....AP i think you have to hero. You say villain here is a pro so him overbetting here on the river is so polarized that its Full house or missed draw.
Flop cbet is fine but way too small. I like cbetting this flop to deny equity as well as get value from his float. I think we definitely size up here(65%-75%) on the flop cause he floats so often and size down on good turns 50% PSB.
Flop 3bet I dont agree with either. I think you have a hand thats a decent bluffcatcher plus alot of turncards that retain equity.
And if villain is any good he would not be betting 88-66 on the turn and river because those hands have very decent SD value.
spadez