Ether Drain is a good thing to have active as much as possible if Fiora is being an ether attacker more than a physical attacker, or if the enemies being fought have good ether attacks. In the former case it's more important to get as many foes in the suck range as possible to get the biggest boost, though this could cause an aggro problem.
Data
Art
Damage type
Status
Category
Ether
Talent gauge used
0%
Cooldown
30.0s
Accuracy
+5%
Obtained
Level 0
Power
Power
1.00
Hits
0
Element
Earth
Timing
Frames
Seconds
Hit
60
2
Duration
132
4.4
Range
Target
Opponent
Area
Circle around user
Range
15.00m
Status
Effect
Ether Drain 20%
Duration
10.0s
Miscellaneous
AI type
Normal
Aggro
15
Knockback
None
Flags
Anti-air: False Single effects: False Monado art: False