I've been swarm kiteing on the beech for a few nights, from what I've found the zombies have the least hp's then the skellies, scorps nif's and outcasts, usually the last 1 or 2 mobs to kill aye these guys.
Been thinking it's odd that the mobs that seem to drop the best loot (zombies) drop first when I swarm... then again I guess it dose help keep the bards in line =)
Be Safe and good hunting