[ACPlayer]

Most players dont bet a small two pair on the river often enough when checked to. Against this player it is right to bet sixth (unless he catches a three flush or open pair), IMO, then check seventh unless you improve.

In general, on sixth, it is better to bet if you know you will call and dont fear a raise.

On seventh, I am inclined to bet 2 pair or better and call a raise (unless i know the player or have a read) .