-This is very opponent dependent and I adjust my range depending on the oponent's postflop tendencies. If he's pretty weaktight I'm isolating wider since our post flop fold equity is higher.If he doesn't like to fold i narrow my range quite a bit since I will actually have to hit a hand to continue most of the time.

-22 with 2 limpers and position "I" would limp behind and build a pot postflop if I gin. But I was reading a post by BigSpenda who said "It's kinda hard to mess up in postion" so raising could also be a viable option.
In the BB just check since it will be hard to play out of postion against resistence without a set.