I'm not a fan of bet/folding here. You're going to get folds from everything except a boat when faced with a bet here (hands which will likely check behind anyway), and anything that beats you will call or raise.

I think the majority of the time a check/fold is best here. I can't see the opponent calling the turn with anything worse than an ace, so I can't see them betting any bluffs on the river, as I don't think they have any bluffs in their range at all, they only really have nutted value. As a result, when they bet the river I think you have to make a fold.

However, if they had a propensity to bet really small on this river, I would change my plan to a check/call, as there are plenty of worse flushes in their range that they may feel they have to try and get some value out of. Its hard to tell whether this is possible without any history against them, but a lot of recreational players (if he/she is recreational) feel the need that they have to get something out of what they feel is a strong hand, and henceforth will bet small in this spot.

Check fold river. He probably have worse flushes on his range but you can deny a high betting frequency with them by checking 2x OTR.

thanks guys