I'm guessing this would be in the lower levels, probably 20-30 range, that have their poisons already but do not have Duel Wield Specialization. The reason for that being that we get a 50% damage reduction in our off-hand weapons, so most of you damage(pre-DW spec) is coming from instant attacks. You would want a fast off-hand weapon i.e. daggers to make your poisons proc more often. Thats mostly spec-based though. If he was a lvl 40 or above, he's got problems.