Hello guys!
Since some players usually ask me the best pre-asc class for celan, I'll post here all the possibilities and let you choose yourselves, since my style of playing may be different from yours.
1 - Royal Command Attack/Multi-Target
Strikes up to 20 targets within 15 yards, dealing extra damage equal to 10% of Attack Power to each target. Reduces the targets' movement speed by 40% for 10 seconds.
Cooldown 6 minutes
*Restores an amount of Health to the caster equal to the sum of the caster's Resistances.
*Has a 40% chance to inflict a random debuff on the target for 8 seconds.
Arden -> Celan Increases Slow effecy by 10%.
Balo -> Celan 30% chance to disarm target.
Celan -> Celan Has a extra 20% chance to bestow a negative effect upon the target for 8 seconds.
Rayan -> Celan Increases the Caster's Skill Evasion by 15 for 15 seconds.
Forta -> Celan Removes five buffs from the target.
Voida -> Celan Reduces the targets' Resistances by 20% for 10 seconds.
2 - Moon Light Attack
This attack hits five times. Each strike deals extra damage equal to 2x, 3x, 4x, 5x, 6x the total value of all the caster's Resistances, respectively. Each strike has a 1%, 2%, 4%, 8%, and 16% higher CritStrike Bonus, respectively.
Cooldown: 6 minutes.
*Reduces the target's potion effectiveness by 25% for 20 seconds.
Arden -> Celan *Removes all of the target's Spirit.
Balo -> Celan *Last strike deal extra damage equal to 150% of caster's defense.
Celan -> Celan *Reduces potion effectiveness by an extra 10%.
Rayan -> Celan *Increases the Critstrike Rate of the final strike by 5%.
Forta -> Celan *Adds an additional 2% higher CritStrike Bonus for each hit.
Voida -> Celan *The extra damage of each strike is increased by 2 (2+2x, 3+2x, etc).
3 - Phoenix Song Blessing/Single-Target
The target's Resistances are increased by 30% for 20 seconds.
Cooldown: 6 minutes
*Increases a target's Skill Accuracy by 25 for 30 seconds.
*Increases a target's CritStrike Bonus by 100%, for 30 seconds.
Arden -> Celan *Increases a target's CritStrike Bonus by an additional 30% extra, for 30 seconds.
Balo -> Celan *Increase target's defense by 5%, last for 30 seconds.
Celan -> Celan *Each effect gains an extra 10 seconds in duration.
Rayan -> Celan *Skill accuracy increase effect increase by 10.
Forta -> Celan *The target's Critstrike Bonus is increased by an extra 50%.
Voida -> Celan *Raises the Resistance increase by 10%.
4 - Palace Dance Curse/Multi-Target
Curses up to 25 targets within 25 yards of the caster, lowering their Resistances by 30% for 20 seconds.
Cooldown: 6 minutes
*Reduces a target's Defense by 30% for 20 seconds.
*Reduces a target's Skill Accuracy by 10, for 20 seconds.
Arden -> Celan *Reduce's a target's CritStrike Rate by 10% for 20 seconds.
Balo -> Celan *Reduce target's defense by an extra of 10%
Celan -> Celan *Reduces Resistances by an extra 20%.
Rayan -> Celan *The target's Skill Evasion is reduced by 15 for 20 seconds.
Forta -> Celan *The targets' Critstrike Damage is reduced by 30% for 20 seconds.
Voida -> Celan *The targets' Skill Accuracy are reduced by 20 for 20 seconds.
Now you just have to choose the one that pleases you and go for it!
Source: JD Wiki.