@soranokira
I would hold onto those Bonbori fairies for now until there is more clarification/better translation of Viera's Skill AW. It might have been intentional considering that there hasn't been a notice of an emergency maintenance to fix her skill yet.

- - - Updated - - -

Fixed translation of Viera's skills:
Viera (ビエラ):
Shooting Position (射撃体勢): (45s; block: 0; range [200] physical [AW: AoE] attack; AS: 34; WT: 12.5; CT: 25)
Suppressive Rounds (鎮圧用散弾): (50s; attack 1.3x; block: 0; ranged AoE attack; won't deliver a fatal attack; AS: ; WT: 10; CT: 20)

There you have it. Viera is terrible now.