100+9 A2o on the bubble

[fisherman112]

hero sb 1400
bb donk 2700
utg solid 3300
button weak/tight 2500

blinds 100/200

folds to sb, hero has A2

here's the problem: the bb is a incredibly liberal defender
who will call a small raise with any 2 and a push with a wide range

the button has folded his sb to hero 4 straight times and is obviously playing for 3rd.

utg is a strong player but not overly aggressive and has yet to call a button push from hero.

should the hero limp or raise?