[rzk]

i doubt it's a two pair or set. it's either a WA/WB line with a pair, a bluff, or a flush. haven't counted the combos, but since Heis's wtsd is above 40 i'd lean towards a raise. if he reraises you probably have a marginal call, though anybody who's played more than 0 hands with Heis should have a better idea of whether he's capable of bluff 3-betting.

EDIT: btw, it's important to know what's his image of you is, more specifically how much he respects your raises.