Is this guy betting the SB unopened a lot? I think a 3 bet PF is good here unless he's tight from the SB, given that he'll be OOP agins a decent player. But I doubt he'd really care given his stats.
The flop is harder. I think it's a raise for me, and I'm expecting a 4 bet almost never. Given the overly obvious flush draw, I'm not sure whether folding this on the flop is ever a good idea (after the 3 bet). He obviously might have woken up with AK or AA, but it's just too specific to put him on that.
The check raise really muddies up his range, I can't put him on anything that we are happy to play against. I think a semi-bluff is possible, but I don't see this being a pure bluff often. But if he really put us on a strong flush draw and has the goods himself, I'm not sure why he'd give us a shot at a free card, rather than giving us horrible pot odds by just betting out??? I think it's quite possible he's flopped that flush or has the
, and puts us on a weaker draw. Fold.