New essence, crystals sinks items could add a cool economy to the game, read on...
Why not adding a constant stream of expensive items in terms of essence or crystals that are tied with your school...
I think that with the student system of the school you could add an other system than the simple ranking but a way to earn essences as disciple or mentor based on the popularity of your schools. So a successful school mentor could be paid for his teachings and afford items that reflect its wealth. Why not add items purchasable depending on the number of students you have ? like school colours, uniforms etc...
The school system ought to be upgraded with all the money sinks you can introduce with that new essence shop.
I think that with the student system of the school you could add an other system than the simple ranking but a way to earn essences as disciple or mentor based on the popularity of your schools. So a successful school mentor could be paid for his teachings and afford items that reflect its wealth. Why not add items purchasable depending on the number of students you have ? like school colours, uniforms etc...
The school system ought to be upgraded with all the money sinks you can introduce with that new essence shop.

Comments
You've given some pretty cool ideas, so thank you! I can't promise that they'll be implemented, but I'll be sharing your ideas to the team. Thanks again!
Asheron's Call had a pretty cool monarchy/allegiance system back in the day