If you do not have Arcane Avenger then use a different aura, such as Growing Power. Additionally, Combat Discipline only works if you are the only person in your squad using it, as if there are 2 or more you will gain health, not lose any - which means it won't trigger Arcane Avenger.

Edited 12/7/21 -

• Replaced Health Conversion and Safeguard with Primed Continuity and Augur Secrets.

• Changed the helminth ability from Elemental Ward to Roar

• Swapped Arcane Guardian For Arcane Avenger and swapped Growing Power for Combat Discipline These synergize well together by keeping Avenger up nearly indefinitely.

• Overall these changes convert [Nezha] into a far better "general use" setup, which is still nearly impossible for any enemy to kill.