There are pros and cons to each gearing of zombie.
Gear VIII zombie gets all her speed pieces, fastest for arena. 2* (can't raid). Best at lvl 80, not 85.
Gear V zombie gets no protection. Can take her to 7* for raids. Still squishy but slower. Best at lvl 80, not 85.
Gear XII zombie has max speed pieces and can raid but is burned if fractured and doesn't benefit Daka and Asajj nearly as much.
Pick your poison. Don't rush to gear or star anything before considering implications. Lesson learned hopefully.