I'm torn between choices 2 and 3. Magical, conjured zombies are usually the stereotypical type (that irritating moaning noise, slowly loping forward with both arms out in front and one foot being dragged behind, hungry for brains, has the reflexes of a corpse with rigor mortis... you get the idea), but a necromancer suddenly raising a massive army of corpses with a flick of the wrist seems kind of appealling to me; but the fast-moving ones are actually dangerous enough to be worth fearing (typical scenario with the slow guys: you feel afraid for a moment because a fucking CORPSE is walking at you, but that quickly turns into laughter because you can drag your entire body with one arm and still outrun them).