There are two main paths for humans to grow stronger. The path of Magic and the path of knighthood.
Path of Magic - Power Ranking
Before becoming a Magus, one must meditate and cultivate their magic power. The transition between a normal human and someone who walks the path of magic is called a probaitionary Acolyte.
There are three stages in the acolyte realm: Beginner Acolyte Realm (Level 1-8), Intermediate Acolyte Realm (Level 9-14), Advanced Acolyte Realm (15-20)
Peak rank acolytes are those who have reached 20 points of Magic Power, and stand at the peak, hence the name.
Rank 1 Magus (Level 21-99)
Rank 2 Magus (Level 100-199)
Path of Knighthood
Preparatory knight (Level 2-3)
Beginner Knight (Level 4-8)
Intermediate Knight (Level 9-14)
Advanced Knight (Level 15-19)
Peak Knight (Level 20)
Half-Grand Knight (Level 21-30)
Grand Knight (Level 31-99)
Supreme Knight (Level 100-199)
About Proficiency in skills:
[0-50] : Beginner Mastery
[50-100] : Intermediate Mastery
[100-150] : Advanced Mastery
[150-200] : Expert Mastery
[200-300] : Master Realm
[300-500] : Grandmaster Realm
Different Magus Paths:
[Body Refinement Path : Acolytes walking this path will do anything in order to strengthen their body. Most would eventually come to use ever stronger toxins in order to stress their bodies to their utmost limits after reaching their genetic limits through sheer training]
[Elemental Path : Acolytes will try to study the elements and research spell matrixes to further deepen their understanding of their respective element]
[Bloodline Path : By injecting the blood of magical species into one's body, one can earn magic power. However, sanity and lifespan is not guaranteed upon doing so]