These are the rankings established within the world so far, showing only up to the orders that have already been mentioned within the story.
Each Order contains different levels within them: Low -> Middle -> High -> Grand -> Peak
First Order — Third Rate
Second Order — Second Rate
Third Order — First Rate
Fourth Order — Master Realm
Fifth Order — Grandmaster Realm
Sixth Order — Profound Realm
Seventh Order — True Essence Realm
Eighth Order — Great Perfection Realm
Ninth Order — Radiant Realm (This is where Dante in his first life was at)
Tenth Order — Mystic Realm
Eleventh Order — Soul Fusion Realm
Twelfth Order — Heavenly Realm
Thirteenth Order — Samsara Realm (Where Dante believed the hero might be at)
Certain orders have different requirements to truly reach and make the most out of, be it enlightenments, a stronger body, etc. They all have something unique about them.
Now onto comprehension
Comprehension determines the utility, output, and various other aspects of what an ability, spell, or technique can do.
The progression of mastery is categorized as follows
Basic
Low Middle
Middle
High Middle
High
Advanced
Peak
Ultimate
Perfect
Grand Unity
Zenith