Tactics for Necropolis.

The tactic is very simple: choose a hero like Tanta or Aislin. In the first week, buy Liches and Vampires (preferably with upgrades) and start systematically clearing the territory around the castle. Later, you can buy a hero like Tamika or Vokial, because Vampires and Knights are great, especially when they have a horde of skeletons behind them. Against neutral creatures, two spells are helpful: Slow and Berserk. Both are expert-level. This will work for both single-player and multiplayer.