I'm not sure I like some of my decisions in this hand in hindsight, so posting for some feedback. Villain appears to be an aggressive regular with potential maniac streak in him, running 18/15/20(!) preflop over 250 hands. He previously 3b me w 65s BB v SB (and called 4bet, then raised J63ds flop cbet w no FD--and called shove). While that's clearly a different construction, it shows how aggressive he is.

Note we are 210bbs deep.

Yatahay Network - $0.10 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

BTN: 100 BB
SB: 223.7 BB
BB: 385 BB
Hero (UTG): 209.3 BB
MP: 91.3 BB
CO: 231.1 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Th Kh
Hero raises to 2.5 BB, fold, CO raises to 9 BB, fold, fold, fold, Hero calls 6.5 BB

I'm struggling with defending to enough 3bets, so have been working in more calls. Perhaps this is just too weak and should be a 4bet or fold, but unsure given stack depth. Open to thoughts.

Flop : (19.5 BB, 2 players) 8h 7h Qc
Hero checks, CO bets 9.7 BB, Hero calls 9.7 BB

Here I choose to take a passive line to ensure that I realize my equity rather than CR, although I could very easily take the more aggressive line. Probably would prefer the nut flush draw to CR.

Turn : (38.9 BB, 2 players) Ks
Hero checks, CO bets 42.7 BB, Hero calls 42.7 BB

Now we pick up some SD value and would expect an aggressive villain to bet strong on this card with quite a bit of his range. Between that and our likely equity we should still be able to call this no problem right?

River : (124.3 BB, 2 players) 5h
Hero checks (?)

We bink our flush, but am thinking it's very hard to construct a sensible donking range so we check with intention of check raising vs basically any size.