Originally Posted by GMP
Excellent first post, my friend.
OP, the best strategy (imo) depends on what kind of passive your table is. Sure, they're limping machines pre, but how do they react to LP raises? EP raises? How does the sizing of these raises affect the number of players who usually see a flop?
On the flop, are they playing fit or fold and dumping their air and weak hands to c-bets frequently, or calling down multiple streets (or even playing back) with draws and bottom pair/A-high type hands? Are they ever leading into the PFR from OOP or taking stabs from LP if the PFR checks?
For passive tables where multiple villains see a flop even in the face of a raise, but fold to a c-bet, you can print money by raising from EP/the blinds and c-betting a high percentage of flops until the table catches on. With a little study and introspection, I'm sure you can figure out good strategies for the other situations.
Regarding your actual question -- imo, the absolute bottom of my SB completing range in a limped pot where I can expect the BB to check most of the time is something like any two suited plus offsuit connectors and one gappers down to 86o or 65o, but limping presents challenges in hand reading (when you let in an essentially random BB and wide LP ranges) and betting for value (when your 72s hits trips on a 822 board, it's hard for villains to have a 2nd best hand that can call you).
So, it's hard to go too far wrong by raising frequently, since you make the hand easier to play afterwards against more defined ranges, get more value when you smash flops, and rake in easy money when your c-bets get through.