I think i was a lot of times in that situation and still not 100% sure what is best here.
there are two weak players open limping,and SB raise. can i defend here with confidence? players are gonna call again almost sure,odds are pretty good,though there is whole card domination problem maybe.
Getting 1:7 it's a pretty easy call! Of course you do sometimes have domination problems but regarding your odds it's ok to take that risk and you said there were 2 limpers. which means SB will certainly just raise for value and not to get heads-up with a fish. he knows that the pot will end up being multiway but he could raise A6s A7s A8s A9o ATo QJs JTs, 66 77 88 99, KTs. You see there are some hands that don't have you dominated but consider that you dominate a lot of hands of your opponents limping range. KJ has some domination problems against SB's range but this effect is not as huge as the effect that KJ performs very well against the other ranges where you have most Jx and Kx combos dominated. Don't forget that. Preflop easy call. Even with K9 KT etc. 
