villain is 50/39 after 18 hands /1.0 agg / 100% fold to 3 bet so far (2/2)

on the flop, i decided to check back cause its a board that hit my range very hard and i feel like i have the nuts here most of the time. hes gonna have lots of pocket pairs and KQ KJ AQ AJ stuff like that... since board is RB there is no FD so i dont see any point in betting.

on the turn when he donks i decided to just call to keep his range as wide as possible and induce some bluff on river

on the river, he bet like i predicted but now my option is between calling and raising. what is the merit of raising here vs calling. i decided to call cause i didnt feel like i would get clal by worst hand while playing but after reviewing i feel like i getting maybe call by Ax or any A5 A4 A3