In general, even without considering the game itself, what unique units could be added to the Tower faction?

The first things that come to mind:

- Dwarves (because mages are not just about magic, but also about the pursuit of knowledge. Dwarves are also inventors).

- Witch Hunters (an anti-magic unit in a magical castle).

- Soldiers in armor, of the same race as the mages themselves – that is, humans. Otherwise, it seems strange that everyone is a mage. Perhaps some don't have the gift or the money, or something else. There must be ordinary mortals...