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

"Slow" is, in itself, a casting of the earth element.

Slow is generally good and also looks good in water (I'd like to see how you run in water ;)), if you move it together with Dispel Magic to earth, then something needs to be removed from earth.

Regeneration - earth

Remember the Pearl Priests from Heroes 6 ;)

Disrupting Ray - air

It also works in earth:

Soil corrosion is the destruction of metal under the influence of an aggressive soil environment.

Meteor Shower - earth

On the one hand, I agree, because in fire, at level 4 of the guild, there are 4 spells, and in earth, there is 1, but on the other hand, in earth, there are 13 spells, and in fire, there are 11. That is, by moving the meteor, there will be only 10 spells left in fire. I think it's worth leaving the meteor (at least for now), renaming it to "Firestorm".

but still - evasion and hide are assigned to different elements.

Evasion needs to be moved to earth, renaming it to "Sand Shield/Barrier", and "Resurrection" should be returned to air.