I have all these characters at level 40, I attack the nun first and prioritise the demonlings with melee units and STILL can't beat this level. My version of the game is 1.2.1
You should be able to pretty easily beat it. They were even further nerfed in the latest version so it shouldn't really matter who you use for that if you have any solid DPS unit. Tell me what your team is and I might be able to guide you a bit.
