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

I really don't quite understand what to do with them; stunning or a paw attack seems appropriate, but I'm not sure about upgrades. Some thoughts regarding Ashan:
Unlike Orcs, Goblins don't have Blood Wrath, meaning Chaos has been removed from them. But here's an interesting point: Orcish shamans defeat their "inner demon" and in the process... melt. Perhaps if mages "cleansed" Orcs of Chaos, they would encounter this problem and simply stabilize the process with Earth magic and regeneration, and the mental retardation of Trolls can be explained by the fact that the mages' methods are significantly different. Figuratively speaking, for shamans, exorcising a demon is like going to a psychologist (with a possible fatal outcome), while mages perform a lobotomy. Perhaps such a violent severing of a part of an Orc's soul and stabilization of the process with Earth magic will give it magical powers and, of course, great growth.