Which faction do you like the most in Heroes of Might and Magic IV?

It's just a flaw in the game, and it needs to be fixed.

It has already been fixed. Install Equilibris, and your vampires will be as weak as kittens! And necromancy has been significantly reduced. In general, after installing the mod, your opinion about your favorite faction should change! :)

It has too little damage.

Actually, Disintegrate deals the highest direct damage in Chaos Magic, targeting a single stack! And if I'm not mistaken, it prevents vampires from being resurrected.