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

I'm creating descriptions for the cities. I compared the map of Ashan after the cataclysm and think that three mage cities could have survived the undead attack, so I think we should keep them.

Added 8 hours and 28 minutes ago
Maybe we could create elemental schools of magic? That would add more variety, and we can explain it all with the cataclysm, saying that chaotic energy penetrated the spirit world and everything got mixed up.