Dark Rune Evoker: This one is the second to appear and first priority target. If allowed to be up too long he will heal/shield those around him for a lot. He needs to be focused down quickly when spawned.

Dark Rune Champion: This one is the next to appear and easily identifyable as he looks completely different to the others. He is the second priority on DPS focus and does a lot of melee damage.He has a Whirlwind ability, so he will cause AoE damage to any in range and also applies a Mortal Strike debuff to the tanks. Healers should be aware of this.

Dark Rune Warbringer: This one appears first and isn't very special aside from the fact that he brings an Aura of Celerity which brings an attack and casting speed increase to any adds around him. A priest can be designated to mind control one of these to ensure that the raid gets this Aura of Celerity too.

Dark Rune Commoners: This one is the last to appear and tanks should merely ensure that they don't irritate the healers. They will die to random AoE and are lowest on DPS priority.