Gameplay-wise she's arguably the best AOE Caster. Can farm with BG, can support certain allies in multi-core farming, party-wide charge is incredibly strong...
Got her np5 but since she just came out recently haven't test enough. Though i did use her for this Koyo advanced quest and she absolutely destroyed it.
She's good, sure, but not needed. Cu Caster will do the same job when it comes to farming, generally speaking. Support-wise she isn't high enough value imo.