The Necromancer's Path.

I don't know. I could also cast spells in battles with the garrison. And the enemy didn't move so quickly. I was playing as a hero. There are one and a half hundred vampires between my hero and the green faction; you can't defeat them right away. You need to break through to the coven of witches; that's where the problem with the green faction is solved. Of course, you need to get the Cloak of Darkness and save up some money. Well, yes. The map is very difficult, but if you think and don't get lazy about replaying, it is absolutely passable.