For mages there is mana system. There are 9 levels ,9 circle

If you want to cast a 5 circle spell at least you need to be a 5 circle magician.

For fighters there is a ki system it has 3 levels and every level has split to 3 parts beginner - intermediate - peak

1. General reinforcement: İn this level you can reinforce your body with ki. You can make yourself faster,stronger,durable

2.Special reinforcement: In this level you can reinforce a part of your body with ki (only arms or legs etc.) And this level is core of the special arts.

3.infusion :in this level you can expand your ki to outside of your body and you can create a aura which is strongest thing in this world.