Overpowered assn's

[WarBlade]

Where are her weaknesses?

Small amounts of elemental damage at high levels or more accurately a split between multiple damage dealers which have questionable impact alone.

Why do so few people play this class? (by my observtion)

Hard to say, but she has many problems like a high potential for lack of damage and also the trickiness of negotiating Charge Ups through lag (It's extremely difficult timing attacks to the third charge and I for one typically wind up doing four hits or more before releasing a desired third charge).

Or am I just missing something?

Missing a fair bit I'd say.