Once you reach level 50 and have chosen a Build for your Necromancer, you will want to start picking out the best weapons to complement it. The weapons or Legendary Aspects are designed to enhance either a specific Skill, a group of Skills, or your overall damage.
Best Necromancer Legendary Aspects
Aspect of Grasping Veins
(Offensive Aspect)
Increases your Critical Strike Chance when using Corpse Tendrils, and makes the Skill cause enemies to take more Critical Strike Damage.
Best Build: Bone Spear Build
Gives you a consistent damage boost.
Aspect of Ultimate Shadow
(Offensive Aspect)
Converts Bone Storm and Blood Wave to make them Darkness Skills, deal Shadow damage, and gain additional effects to deal damage.
Best Build: Infinimist Build and Sever Build
Gives you extra forms of Shadow damage.