Magnificent, thank you for the feedback!
I have a question about Nicholas's specialization: is it really intended that there is no limit on the number of summoned stacks in a single battle?
Yes, the number of summoned stacks is unlimited — the longer the battle, the more there are. Quite in the spirit of how Necromancers wage war. However, the size of each one depends on how many Vampires you fielded at the start of the battle. And also on how heavily Nicholas is leveled up) Perhaps I'll reconsider this aspect.
And then it suddenly turned out that I couldn't win without losses, because the Vampire stacks summoned by the specialization are unlimited, the battle drags on, the game started to lag, loading.
I'll increase the time intervals between the appearance of summoned Vampire stacks — that should help.
I defeated everyone without losses and without any problems using Bringers under Vampirism
The problem here is probably only in "Vampirism" itself. Because with it, it seems, it's too easy...