Tactics against Necromancers.

And also, the Dungeon is effective. Black Dragons, flying Manticores, Minotaurs with good morale, Harpies, and two units of Archers. Plus, doubled mana and the ability to buy creatures from external dwellings. A very powerful town against Necropolis. But they have few hit points (except for the Black Dragons) – Vampires can seriously damage them. Therefore, the first thing to do is to attack the Vampires.