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

Interesting, I’ve already given up on this option :D
I was also thinking about organizing it in such a way that Chaos magic becomes Fire magic, and Suppression of Chaos becomes Water magic – Water magic spells are obtained through perks, as well as the Earth-Air pair, but here there is a problem with Orcs – their inclination towards Earth and Air makes the following option more logical:
Chaos=FireVSSuppression of Chaos=Earth
and accordingly
Summoning=WaterVSSuppression of Summoning=Air
Explicit spells that do not belong to specific elements – elementals, teleport, magic arrow – can be crammed into Wizard magic again by linking them to certain perks (Wizard magic, as a form of mastery of primordial magic)
Of course, this also looks rather unsightly, but in this way, all the elements are highlighted, and the lack of spells (at least 70 spells are needed for 7 schools) can be balanced with passive perks (various suppressions, elemental lords, penalties similar to Storm Wind and Fog Cloud, etc.) – that is, there is a reason to develop magic, but the number of spells per school is smaller (approximately 7-8) – this can be helped by transferring some of the abilities of units to schools of magic (I tried, but I couldn’t:( ) – that is, transfer the Thunderstorm of the Thunderlord to Air magic, and Lay on Hands to Water magic (calling it Healing)