well if I bet the turn, there is no way he can make a profitable call with a flush draw even if I pay him off every time so yeah I'm calling a river donk shove on that board even though it's kind of sick because he can sometimes donk shove a queen for value since he doesn't want us to check it back
I mean if you really think he's going to bet that turn a lot, then it's fine, but I would be worried about him checking back normally

so it's like the more sure you are of your read the better this play becomes so after your second post I thought "well this is probably justified then"

but another factor against fish is that if you make turn like $3 so it's $10 pot with $4 in his stack, he can't fold a pair on the river because the pot is so big... and of course the fish don't understand they can't call a bet on the turn with crap in this spot with these stacks
but if he has something like TT he would check the turn back to get to showdown, but he might feel tarped into calling a river bet because he's already put so much money in