Tactics against Necromancers.

Berserk magic against Necropolis? That's something new... If I remember correctly, many spells, such as blessing, curse, joy, sorrow, and berserk, don't affect the undead. If there are only two creatures in the army (vampires and Dark Knights), you can't just blow them away with a dragon right away, and you need to position the creatures correctly when attacking, not side by side...