Playing as the Stronghold faction (Disciples 2).

It's much easier with the Horde.
Again, three Warriors (I try to level up the Spectral ones), a Hero, a Mage, and a Spectral creature.
In their case, the Hero and Mage can be swapped; that is, if the Hero is a Vampire, we level up a Lich; if the Hero is a Mage, we level up Vampires.