It is going to depend in detail on how fit-or-fold the villain is on the flop (or, if they are sticky on the flop, how often they fold on the turn).
I have been working with a polarized range in the SB that includes just completing (including having an limp/reraise range); however, that is best for playing against a tough villain.
Against a loose-passive sucker like this, I would size up my open (4x or more), and tighten up to a strong, linear opening range. This means giving up a substantial number of hands preflop. I might fold 22 or even 33, but I am definitely opening any bigger pairs.
As for postflop, we are going to have both range advantage and nut advantage on these boards, with lots of flush draws. I would be betting something like 1/2 to 2/3 pot against a fit-or-fold villain with a substantial fraction of our range. The c-bet only needs to work 33% (if half-pot) to 40% (if 2/3 pot) to be profitable, and a fit-or-fold villain is going to be folding 60 to 70% of the time. My smallest pairs are definitely going to be in my betting range for equity protection.
The stickier the villain is, the smaller and more value-weighted my c-betting range is going to be. If I know they give up on the turn a lot, I will bet a lot there; with a small pair, I would be more likely to bet them if one of my cards was suited to the front-door flush draw.