If we get it in against the limper we are paying 14BB to win a pot of 30,5BB, so the break even point in pure chip EV is 45,9%. A3s has 45% equity against A6o on average, so if he has that exact hand and limp-jam, we are essentially making a neutral EV play. And in my experience there will also be times, where the limper fold, or where he get it in with a hand like K high, Q high etc, which we are actually ahead off.
The issue I have with folding here is, that most limpers are incredibly loose. Today I had a 70% VPIP whale on my right. And if I only enter the pot with premium hands, every time he has limped, then I end up playing almost no hands and getting blinded away. This can be sort of ok for the first few blind levels, but as blinds go up, you simply can not sit and fold every hand waiting for aces or kings.
Also raising up limps do a lot of things, which are beneficial for future hands. Maybe he fold, and now he is somewhat discouraged from limping the worst trash, which gives us more opportunities to open raise. Maybe we tilt him, so he make a stupid mistake in a future hand. And maybe we bust him, in which case we also get more chances to open raise without having to deal with a limper.
In this particular case even dubbling him up is sort of beneficial for future play, because now Hero can raise his limps without committing himself, and he have more chips for Hero to win. A lot of people "dont want to gamble with fish". But this is a huge mistake especially if you have position on them. If you win their chips, its job done. And if you lose, now you put chips in the hands of a bad player, whom you have position on. Which is an excellent situation for you, as long as you still have him covered.
