[tytygoodnuts]

I would raise preflop, but I don't think it's a big deal either way. You obviously have a pot equity edge, but by keeping the pot small you encourage more mistakes from donks post flop.
Definitely raise the flop. You are most likely ahead.
If you raise the flop the turn situation would be easier to play. As it is I would call down after the three bet. The pot is starting to big and the safe play is to just call down. You say that the villain is wild PF but not flop? I'm sure his wild tendencies carry over to post flop at least a little.