I played a bit with the trip kiala team. It seems fairly strong. You can get several succubi which takes at least one character out of the game and then gang up on the other two. Plus you can drop corruptions and such. I think it's strong now... I can't imagine how good it'll be once the warlocks get a better selection of debuffs.
I ran 3 hellcallers with two summoned succubi against mike on vassal. I had him locked out of the game by turn 6. It was pretty rediculous. Phadalous made one lightning bolt attack on turn 2 and was ticked up to 10 with 1 health on turn 6. I think this team loses to ogres, but against anything else, it's beastly.