Chadders mentions in his HT vid pack that an overcard to second pair is generally a good spot to bluff, however I'm probably folding the river donk as villain checked down air previously. Not many hands to base that on though.However...I don't see much 6x in villain's range that would call your pre flop and flop bets, maybe A6 or K6. A 9 would probably have CR the flop. 3x and 4x I think would check-call, but again there isn't a lot of 3x and 4x that would call a min raise pre flop. On second thoughts probably a good jam - it seems that villain's range is weighted towards bluffs to me.I'm still a beginner so take the above with a grain of salt.

I think turn is probably a check, it should improve most of his straight draws. I'd like a bet much more on a 8 or 7. I suppose betting to fold out 4x/3x with the third barrel isn't bad but since cards are so low and he doesn't seem like a 100% vpip total fish so far, I expect his c/c range to be weighted toward connected hands at this flop. Also our hand still has showdown value vs all his flop floats and we can pick off his bluffs on a lot of rivers if we check turnRiver is def a fold tho. Jamming is most always worse than calling since I don't see a random ever bet/folding for thin value there. The best case scenario would be if he c/c'ed 4x/3x two streets and tried to bluff river but I don't see him folding that either with so much money in the pot after that move. so in the end either you're beat and getting called, or you have him bet and are bluffing with the best hand. thus the decision is either fold or call. most of his draws and even some floats like A6/K6 improved to trips or better by the river, and he's repping it pretty hard w the small lead. on the other hand, apart from A2 and some double floats w 5x nothing really missed, and a lot of those hands have showdown value anyway, so his bluffing range should be pretty narrow, and we're unlikely to be getting 20% equity we need to call here.