Just picked up a set of tein flex coilovers for $300

Anyone have a set and what setting do you think I should set the dampening at? Its my daily driver and the roads in hawaii are kinda rough. I think I'm at halfway between full soft and full stiff but it still seems like im bouncing all over the place

The ride also seems pretty rough probably because I'm on coupe 19's with stock tire sizes. Maybe I should get a meatier tire for the front? What do you guys think? Or just get 18's with fatter tires?