Like it was said above weapons on pets only makes a difference in damage if the damage on said weapon is greater than half the max damage for that pet (ie. 7 dmg sword hits for 14 max). From 24 to 39 you can give your pet 2 weapons to get it to dual wield. Unless you're going for the procs there's no reason to give your pet weapons after 39. Not that I can think of anyway
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