I don't know how you guys are getting it done, as a fire mage they over run me within seconds. I can't cast my spells fast enough to keep them down. Why would blizzard make it solo, without your guardian to help you and flood the room with damn imps. hard is one thing, but at least make it possible for people NOT geared out the hind end.
What is really the damn point to this quest, to see how much we can die? I died at least 5 times, the warlock performing the ritual never died, the imps never attacked him even when I was dead, ran back to just out side the room to rez, eat to bring my health back up and step in for him to "start the ritual" and imps come pouring though the portals again. However after the 5th (or so) death, the quest completed. WTF?
OK, as zenithstorm mentioned, the books tell you the names of the runes to use.Dregla is often used in rituals that draw upon large amounts of fel energy, but needs to be balance by arcane and death magics. Talar is used to empower arcane rituals. Taam can be employed in many rituals requiring powerful death magics. So, Dregla, for the power and Talar and Taam to balance it.