I would go into the shroud walk up to a lieutenant in part 2 by myself and with manyshot shoot the lieutanent. In 20 sec the lieutenant would be at 50% health. The next 1:40 I would do very little damage (the lieutenants get regeneration from other lieutenants). Archers do more dps for 20 secs then any melee build, but then they are far far behind a melee for the next 1:40.