I finally got around to knocking out the dark Clair Eternal dungeon. I used (on manual):

Dark Lilith (yin/yang)
Gambler (angel/warlord/cosmic)
Clairvoyant (celestial/cosmic) - (her power move 'time to live' helps with the reflected damage early)
KP (greed,/random green/cosmic)

I kept Vampire Hunter Ed (sacred/reaper) in reserve to use his fury to revive anyone who died and used 'mark' once in a while to increase damage.