Aspect of the Damned:

Reduces the Essence cost of Blood Surge, and grants bonus damage while in the process of casting it, which helps in tough situations.
Aspect of Blood Craze:

Blood Surge applies bleeding to enemies, making them take additional damage over time and allowing you to Diablo 4 Items sustain damage without overexerting your Essence.
Gems
Emeralds in Weapons: Boost Critical Strike Damage and Intelligence for scaling damage.
Rubies in Armor: Provides Increased Strength for survivability and boosts your health pool.
Skulls in Jewelry: Adds Armor or Vitality, improving your defenses.
Elixirs
Elixir of Blood:
This is a must-have for Blood Surge Necromancers as it increases your Essence regeneration, allowing you to use your most powerful ability more often.
Elixir of Precision:
Boosts Critical Strike Chance, allowing you to Diablo 4 Items for sale score more critical hits with Blood Surge and other abilities.
Elixir of Advantage:
Increases Attack Speed, helping you deal more damage in a shorter amount of time, especially in a group of enemies.