Keep those ghost dudes with crap hp and comparitively high rcv, 4 minimum. Keep as low a level an ogre as possible, and make some poison friends (lilith best since she has low hp and high rcv), lead with ogre (it makes you survive any single hit as long as your hp is over 70%), use the 4 ghosts, and your poison ally to take on expert friday dungeon. The dual orb dudes oneshot you without ogre leader bonus, and they take 1s from everything, but their max hp is just a handful. Try to get some as drops, they offer amazing early game stats and only cost 1 teamsize!