Which castle do you like best in Heroes 2?

Necropolis is quickly defeated on difficulty levels starting from "Hard". When enemy heroes immediately flee after a couple of turns. They manage to "bless" you with their holy words five to eight times a week, while your undead stand around scratching their worm-ridden backs, watching the fleeing enemy. After such entertainment, no amount of hundreds of skeletons will help. The Necromancer's trump card is having many skeletons, vampire lords, and liches. But what good are they if the enemy is constantly running away?