Whats your range to iso3bet aggro crazy fish?

Do we really want to bloat the pot preflop against this V? The hands shown, V played fine preflop, and he folded once - probably correctly. The mistakes V makes are postflop, so our goal should be to maximize the number of times we are playing V on the flop. Imagine he had QT when we 3! AQ, we don't want him to fold if he is going to make a 100 bb mistake when the flop comes Q high. So in isolation, we want to 3! this opponent less and call wider. Setting up opportunities for him to overplay moderate hands and avoid folding out holdings that will make moderate hands.

The only reason I wouldn't call is dependent on the player tendencies behind. If a squeeze is likely, then you have to fold. With A7s specifically, I'm fine playing multi if a few others call, because I'd play smash or fold, putting more in only with FD or 2p+. Confident fish will gii often enough when I smash. Even multiway, FD or 2p+ is happy playing a large pot.

Depending on other players, maybe we can flat when he bets big and/or we have a decent multiway hand, and size down our 3! if we can find a size that keeps others out and keeps him in with a wider range. If others are squeezing a bunch or cold calling our 3!, we might not be able to effectively exploit and have to play base. Bottom line, I think we want to keep preflop small when V is prone to overplay post, to the extent that everyone else in the game will let us.