check call most bets. Lotsa bluffs could happen here, and Ax should hold up often enough, i dont think many people playing 6x or slowplaying something

100% check river

Pre: I might advise a more inexperienced player to just fold. The hand isn't really strong enough to play sub optimal strategies profitably. But anyone with decent hand reading ability and basic post flop skill can continue. For those players, 3 betting feels better than calling imo - v1's range is wide and he most likely overvalues our range (like most people who don't pay attention), thus is never 4betting us light and will be easier to play against. Meanwhile v2 on the button is very exploitable. So taking the initiative and increasing our fold equity from the get go is a big advantage, especially oop.

Flop: Our hand is so strong that check/raising or leading are both fine - whatever you prefer works.

Turn: We should have this hand pretty locked down most of the time, only hand I'm worried about is A8 from V1. It'd be unusual for other better hands to get here like this. Betting smaller makes sense to me to get more value from weaker pairs and draws which we just have so smashed. $75 like you bet is fine.

River: Now it's a bit confusing to be getting this much action on this run-out. It might be possible that V2 has been nitting up with 66 or 77. I can't think of many other hands he should have - hands like KsQs/TT are very marginal for an extra tight post flop player to be calling on the turn. So I think going for another value bet is just a little too greedy - it's not that likely to get called by worse to begin with. Not to mention V1 can still have A8. This actually looks like a check/fold most of the time now.