Under ztalzin lead...a dead nightsister revives long enough to assist another night sisters basic attacks then dies again unless the target was killed then she stays alive.
Also old daka rez, zombie has 2 free rez's to whomever dies first if over g10, and last but not last if mother talzins group attack kills someone then it,ll rez a dead nightsister.
Might say night sisters like ressurections ALOT.
Try using bounty hunters with boba/jango or other teams with strong group damage or throw thrawn on whatever team to shut down zombie long enough to kill your targets.
Watch out for rampage zeta'd assaj to ramp her damage up as the death count rises! ;)