77 set river

You can bet pretty big because he has few strong hands, likely no straight and almost no sets that didn't raise before. So I like a 3/4 to pot size river bet.

You can not bet big because a lot of draws bust, that is not a good reason. It may be a good exploitive reason, if you think he calls too much when this is the case, but it's not a sound theoretical reason.

If he raises river, that's only representing TT and perhaps 88 for value. Not sure which bluffs though, I guess 99 and some 98 97 might make sense, and only a few of those are easily enough combos to call a raise. Doubt you can fold 77 to a river raise, no matter how big you bet.

I hit jack pot, Internet answered my question

I was thinking exploitative on river, i dont try to play theoretical vs regs who are not very very good.
I try to play balanced on flop and turn because those spots happen often, and villians can have enough sample size to notice if i play unbalanced, and can have vs hero stats.

Theoretically imo on river imo it should be shove with most strong hands which is max EV vs weak range defending 1-a. That way we ilcan use max number of bluffs in balanced range.

Thanks for answering, hope to see more answers from you