RTF is a global modification that replaces all towns in the game.

I had this idea: in Heroes 6 and 7, each faction has its own type of siege weapon (I'm primarily talking about the visuals here). We can't do that here, and there's no need to, but we could make the central city tower not just a tower, but something more interesting (we can draw ideas from Heroes 6 and 7 or come up with our own). For example, for mages (or those who transform into them within this mod), instead of a central tower, we could use this unit from the Heroes card game (I once wanted to put it on level 7 of the academy):
Guardian of Ages. The result of a joint effort by the House of Matter (creators of constructs) and the House of Anima (adherents of the old covenants of magic, summoning, and binding spirits). This creature, due to its instability, can cause a lot of trouble if it gets out of control. Therefore, an entire conclave of mages is assembled to control it. But it's worth it. First, its striking power is extremely effective on the battlefield, and second, its creation and summoning only strengthened the trust between Al-Safir and Al-Imral.