The most useful of them all is the Vampire! I consider him the main opponent of Water Elementals and Djinns, but if you cast antimagic on him, everything is fine, and add the strength of a dragon, plus the most important thing is to give him the cat-like reaction, with which he attacks twice without retaliation and drains twice! :) It's a pity that you can't cast blessing on him. :(
I killed creatures of the highest levels with Vampires without casting these spells (including the Dragon King), of course, there were more Vampires, but they are 3rd-level creatures, and there should be more of them.
And in general, a great unit, it can do what others can't:cool: