Level Vitality for the rest of the game, except for when you need Strength for gear.Farming Countess for the Runes to make White (Dol + Io) and Lore (Ort + Sol) is wise, as those will be useful for most of the game, especially while leveling.Using Corpse Explosion on enemies after killing them with Bone Spear can lead to devastating Corpse Explosion combos.Bone Wall and Bone Armor also excel at this, before you get Bone Prison. Bone Prison will be your main tool for survivability, as it can lock down bosses and entire rooms full of mobs.All of these, even at level 1, provide a substantial boost. Many skills are good to invest a single point into, including Amplify Damage, Clay Golem, Iron Maiden, and Corpse Explosion.Your main source of damage early on will be Teeth, but later you will transition to using Bone Spear instead.This build is designed with progression in mind, to get your Necromancer to Hell difficulty, where you can respec into an endgame build. The fastest way to level a Necromancer is by using a Bone Necromancer build, which will easily carry you through Normal and Nightmare difficulties.

Diablo 2 level by level guide