My apologies if this is a repost but i dident see it anywhere.
first off you will need a warlock, and two toons that can stealth, one druid and another druid or a rogue...
after clearing illhoof head up one of the ramps, you can look to the left and see the consortium repair guy on the next ledge, have the stealth characters sneak there way past all the mobs in the next rooms untill they are in the room with the consortium guy right before chess. next have the warlock stand as close to the ledge as he can get and lifetap himself to death. the druid can now battle rezz him from the other ledge, then simply summons the rest of the party, after clearing chess the trash mobs will be gone =)