i like a 4x raise in early position at low stakes.

You can 3bet the flop or you can call. In this situation I think they are both about equally good in different ways.

Im not good enough to tell you exactly which one is better in this spot, but I definitely like calling here a lot. He's giving you ridic good pot odds, your hand isn't a favorite over his range, and he doesn't fold to a threebet that much considering he raised multiway on this board.

On the river you need to lead strongly or check/fold. I like check/fold best. It would appear that you were aiming for him to fold exactly a busted draw, cuz thats all he folds to that bet; and given that you have KsQs and that theres an offsuit ace out, a busted draw is highly unlikely.