Fortress versus Necropolis.

Regarding the shortcomings of the tactic, please provide arguments and specify what the specific shortcomings are.

First, let's consider the lack of summoning. How are you going to clear out serious neutral creatures, like titans, without summoning and a spiritual connection? Furthermore, we immediately lose the phoenix, celestial shield, and wall of swords.
Next. It is mentioned that there is domination and vampirism. It is not a given that they will be in the guild, or that there will be either domination or vampirism, if the second castle does not have dark magic in its guild. What should be done?
Third. Usually, antimagic is used against domination.
Fourth. No one has considered that the dwarf can also take chaos magic and throw a few Armageddons.
I think I've written enough.