Hello everyone,
I'm a [Nezha] main for some years now and thought I could share my builds aswell. Please notice that [Nezha] is a highly versatile warframe and these builds work for me and my playstyle, but might not fit yours. Okay, let's start!

Consecutive Killing
This is my build for consecutive killing. It works best in endless missions where enemies are spawning regularly and where you only need 1-3 hits per enemy (with the help of your 2). I don't recommend it for Open World missions, but it can work in Steel Path.

Purpose
Spam your 2 and your 4 to damage the enemies, make them vulnerable and - most importantly for this build - drop health orbs. Use a companion with [Synth Fiber] and Synth Deconstruct to make maximum use of all the health orbs aswell as dropping even more.

Difficulties

• 2 Forma
• 2 Umbral Forma from Nightwave or The Steel Path Honors Shop
• 1 Aura Forma from Arbitrations (Rotation A: 1%, Rotation B: 2%, Rotation C: 4.5%)
• Health Conversion and Energy Conversion from Cephalon Simaris (100k standing each)
• Transient Fortitude from Orokin Vaults (Rotation A: 4.35%)
• Adaptation from Arbitrations (Rotation A: 2%, Rotation B: 2.5%)
• Equilibrium from Lephantis (Head: 7.52%)
• 168k Endo in total

Variations

• Controlled Slide instead of Power Drift
• (Primed) Flow or Streamline for Equilibrium
• (Primed) [Continuity] instead of [Energy Conversion]

Companion
Take whichever you like. I fell in love with my [Smeeta Kavat], but any other companion works aswell.

Focus School
Take whichever you like. I like using and playing around energy as much as possible, so I tend to use Zenurik on most frames, though Naramon for melee focused play and the other focus schools work aswell.

Arcanes
Both Arcane Avenger and Arcane [Guardian] work really well together with [Combat Discipline] and [Nezha] can handle the negative effect of [Combat Discipline] really well. Consider swapping Molt Augmented for Arcane [Guardian] if you want more survivability.

Helminth

[Nezha] has a nice kit on his own. If you want to infuse this config with a helminth ability, I'd recommend Warcry from [Valkyr] together with the augment [Eternal War].

Q&A

1. Why not [Blind Rage] instead of [Transient Fortitude]?
   If we run [Blind Rage] with this build, we also have to use (Primed) [Flow] or Fleeting Experise to counter the high energy cost, otherwise you are almost out of energy after a single 4 use.

2. Why [Equilibrium] instead of Hunter Adrenaline?
   I feel like in most content I don't take enough damage on health to justify the use of Hunter Adrenaline. Energy- and Health Orbs drop everywhere, especially enemies affected by Blazing Chakram, so we can make constant use of [Equilibrium]. [Equilibrium] also has a great synnergy with [Combat Discipline] as we can always pick up Health Orbs, meaning more energy thanks to [Equilibrium].

3. Why do you call this build "Endgame"?
   I call this build "Endgame" because of all the difficulties of this build, which you can see in section Difficulties. Even if we ignore arcanes, you still need 168k Endo, 2 Umbra Forma and several more or less rare mods. If you have the resources for this build, you are in my eyes in the endgame of this game. Notice that this build isn't meant for level cap endurance runs.

My [Nezha] Builds
Take a look at my other [Nezha Prime] builds aswell!

Updates
16.09.2022 Updated several sections of the guide like Difficulties, Variations, Arcanes and Q&A. Switched [Primed Continuity] for [Energy Conversion].
25.06.2022 Got rid of [Augur Secrets] and put in [Adaptation]. As this build is about killing stuff rapidly, I switched [Corrosive Projection] for [Combat Discipline] to make use of the [Combat Discipline] + Arcane Avenger combo.