Exalt Ranks:
1. Recruit
2. Adept
3. Elite
4. Ascendant
5. Warden
6. Titan
7. Paragon
8. Overlord
9. Zenith
Note: Every Exalt undergoes a qualitative change every three realms, so an Ascendant would be many times stronger than an Elite, even though it's just a single power realm.
I would explain the rest as the story progresses.