Pretty gross turn card.
I bet the flop for near pot. Its such a wet board, someone will call, and we want max value.
As you say, its difficult to narrow villains range since he's so aggressive. If we can, we want to at least make these guys think they have fold equity. I think the board is running out in such a way that we can't call though. He's got $30ish behind, I think I just raise this to $18. It commits him, and maybe we can get him to think he has fold equity, and he'll shove his 8-out draws that should fold if we shove ourselves.
The other line is to call, and never fold the river. This guy is a stabbing & bluffing
machine, and if we call here, we certainly get a half pot bet from him on the river. But I think the board is wet enough and our hand is strong enough that I'm just going to try and play a big pot on the turn.