Zeltrus

Best for increasing Combat Class (CC), which is vital in competitive PVP to secure the first turn.

While LR Zeldris is powerful, Dark Demon King (DK) is often considered better or a safer choice for team viability. LR Zeldris is considered a slight "sidegrade" (similar power level but different utility) to existing DK teams, mainly effective if you have high CC. Zeltrus

If not using LR Zeldris, the Green Festival Zeldris is also a strong choice, primarily as a backline support or for specific PvE content. If you'd like to narrow this down, let me know: Do you have LR Escanor or Gelda to pair with him? I can give you more specific team setups based on that. Best for increasing Combat Class (CC), which is

Squishy, struggles to survive long-term (low tankiness) compared to other, more defensive units. If not using LR Zeldris, the Green Festival

Investing in his LR form is worth it if you run a strong Demon team, as he can become a central damage dealer. Key Considerations

High damage output, ability to lock down opponents with debuffs.