Are there any builds for a neutral Deirdre?

Weapon: Divine Naga
Assist: Draw Back or Reposition
Special: Iceberg
A: Distant Def 3 or Fury 3
B: Quick Riposte 3 or Green Tomebreaker 3
C: Speed Ploy 3
S: Attack Ploy 3 or Distant Def 3

Possibly the best I can think of. Ardent Sacrifice does not synergize well with Quick Riposte, unless you run Renewal 3 on her, but she's most likely meant to take on strong magical users -- mostly Bladetome users since her weapon, Divine Naga, nullifies foes' stat boosts.