I don't like the listed options. I'm gonna have to go with the school of Dark Magic from the Might & Magic series. Which has little to do with necromancy. Raising a slain enemy doesn't change their hostility towards you.
Dark Magic deals with things like Armageddon, a massive AOE damage attack (to which your own characters are NOT immune, so casting it can kill you as well); Pain Reflection, which rebounds physical damage taken; Finger of Death, which attempts to destroy an entity's soul but does no physical damage; Mass Curse, a large-scale enemy debuff; Day Of Protection, a spell which wards against numerous elemental damage types; Soul Drinker, a powerful ranged vampiric spell affecting multiple targets, and a slew of lesser damage spells.
Dark Magic deals with things like Armageddon, a massive AOE damage attack (to which your own characters are NOT immune, so casting it can kill you as well); Pain Reflection, which rebounds physical damage taken; Finger of Death, which attempts to destroy an entity's soul but does no physical damage; Mass Curse, a large-scale enemy debuff; Day Of Protection, a spell which wards against numerous elemental damage types; Soul Drinker, a powerful ranged vampiric spell affecting multiple targets, and a slew of lesser damage spells.