[Edratman2]

I think it can be done, although I don't know how to get around indy mages.

Set the nation's only pretender with earth and set the price for all other paths so high that you cannot afford to take a single one. Then all you would have is whatever you put on the nationals and the pretender with earth. It wouldn't be too bad if the pretender did have access to a little earth magic.

As for speed, I do not know if the command "#researchscale" affects only your nation or everyone. I've never used it but I am sure someone can advise.

Another alternative to Wauthan's fine tiered suggestion is to put your summons at level 8 (for example) in different schools of magic.