Once all of the above named are dead, Commander Mirrakar (98^) will do a zone shout and spawn in the upper-center of the map. He is paired with Grelke Stormwind (98) and Lyderi Umbralwing (98). If you kill Grelke or Lyderi the Commander will summon a lot of spiritual energies to fight you, so take out the Commander first! (you may still get a few spirtual energies but not enough to get overwhelmed)