Zombie endless horde vs Nilhus Annilihate or Boba Execute

I agree with Execute being renamed disintegrate (^^), but the idea of the nightsister zombie is that there is a literal horde of them, so when you kill one, its "revive" is supposed to mimic a different one taking its place. That's why instakills or anti-revives don't work. But I feel that that should be the only way around them instead of some crap like immortality. (not a thing, but an unfortunate possibility)