I´m running auto Magus/Insanity with:
Derby Demon // Ragnarok + cosmic(serenity)
LAD // Midgards
Domino // Niflasomething + cosmic
Lilith // Fortune + cosmic + green
Avg 5.10.. too much, there should be room for improvement.
BUT: Occasionally Lilith might die at the last wave, not defeats until now though.
EDIT: just swapped cosmics on Lilith and she doesn´t die at all.