Villain is a solid reg playin 23/19 with a  steal of 60% from the BT. His fold to 3bets on the button is 83%. Not sure if that's a sample issue or if he indeed is leaking there. He is more aggressive postflop then your average reg. He floats more, folds less etc. you get the point. 

I choose to 3bet with 84s. Not sure if this is optimal this deep. This is a rush table and I didn't notice we were 270bb deep until after I 3bet.

Would like to get some input on my play on all streets, especially on the turn. I feel it's a pretty gross spot on the turn. I like my donk but the sizing is perhaps bad. When he raises all options feel kind of bad. Don't love folding the flush, don't love raising and don't love calling but I assume calling is best? Problem is it gets really gross if board pairs or another club hits on the river.

Edit: IN retrospect it's maybe better to go for a XR on the turn?