Angels and paladins – how to use them? There are also discussions about them here.

I don't know much about this tactic, but here's what I do know: With Paladins, using "Righteous Strike," and with Inquisitors using "Stone Skin" and then attacking, I could take down 13 Black Dragons. (The hero had 17 attack and 34 defense.) With Archangels, we can resurrect the Paladin if needed.