Your strategy for playing as Necropolis.

Undead archers are practically useless, but if you upgrade them to legionnaires (bone warriors), they will form the main infantry layer for the main attacks against the enemy. Zombies are just cannon fodder; they are numerous and needed to defend positions. Ghosts die early but manage to annoy the enemy. Vampires, especially lords, are the ideal army for Necropolis; the main winning force relies on them. Death Knights are good in large numbers against small units of level seven. Liches are good archers and decent mages; they form the main rear of the undead army. Dragons are weak and not very durable; they are good when you need to finish off a strong enemy who will not counterattack.