Which skills are best for a hero?

The Soldier unit works very well for the Necropolis faction: with a "favorable" setup during battle, targets fall asleep after almost every attack from the vampires. And what Lordesat and Mish-gan are talking about most likely does have some merit. Specifically, in the games they are used to playing: because they spend 6 months leveling up!!! Therefore, finding a stack of enemies that will fall asleep after an attack from vampires is indeed difficult... This is where the misunderstanding arose regarding the Soldier unit for the Necropolis faction. However, if the goal is to raise mostly vampires from the dead, then there will probably be many more of these aforementioned stacks among the opponents.