Depends: are you going for a Bone Necromancer build or the Poison Necromancer build? Meleemancer Summoner or Pure Summoner?
If for Bone, stop investing skills in Dagger, and go for Teeth, and all the "Bone" attack skills. If you are going Poison, then keep going for Poison until you get P(oison) Explosion or C(orpse) Explosion. If Meleemancer, the max out Dagger and Skeletal Summons. For Pure, stop investing, and go Summon skills.
Your call. You can NOT invest them, and simply do some public games, such as Tristram, Tombs, Cows, Ancients, then Baal. You can then spend all of your points as you like at a later time (you won't be able to participate in the killing if you do level rushing, but it's all good).







