Attitude towards complete anti-magic!

I didn't understand the answer... What do buffs have to do with it? That's clear. Right now, we're talking about the fact that a Chaos mage won't waste mana on a tiny amount of hero health. He'll immediately attack the troops, and if he's lucky and can research Hypnosis in his castle, it's better to research IV-level Haven magic and have his creatures destroy your army.