Unconventional Sharena build

Hi people! I need your oppinion about my new Sharenas' build, it could be useless in the actual meta, but i love doing this.

Weapon: First Bite+ (Speed)
Support: Ardent sacrifice
Special: Bonfire
A: Earth Bosst 3
B: Renewal 3
C: Threaten Atk 3
Seal: HP+5