Sure! Here's a revised list eliminating duplicate-sounding ranks:
Knights
- Shadow Knights
- Dark Knights
- Abyssal Knights
- Void Knights
- Pure Shadow Knights
Snipers
- Phantom Snipers
- Stealth Assassins
- Cold Blooded Assassins
Royal Ranks
- Rxses Royal Guard
- The King's Hand
- The Sovereign of Rxses
- The Queen's Protector
Special Knights
- The Golden Knight
- The Darkest Knight
- The Crimson Knight
This version maintains distinctiveness among the ranks while still conveying their respective themes.