Its funny, we were just talking about this in clan chat the other day. Warriors should really lead and get the first hit, its easier for everyone involved. Thats how i leveled my barb, and i played 'cleanup' with my lock. Sometimes though in one ranged one warriors, its nice if ranged hit is just an instant before warrior does so they take the agro, and possibly avoid warrior getting damage....works great with lock grinding with powers and barb using berserk etc.....can grind very fast with minimal rest, assuming that the barbarian doesn't agro too many mobs......ahem...klutu...ahem