Instantea here with a Umbral Nezha build!

• Any aura works, corrosive projection is there because it's basically universal and doesn't require a forma.

• The umbral mods, along with adaptation provide a solid amount of tankiness.

• No arcanes required for this build, however arcane energize is universal, and can be used on any frame, [Nezha] is no difference. If you don't have any arcanes or don't have any arcanes worth putting on Nezha, don't bother. He's excellent even without them.

• Lots of flexibility in this build. If you prefer Strength over efficiency, drop the efficiency mods for blind rage and/or one of his augments.

• You do not need to unlock the exilus mods slot if you don't want to. Nothing is needed there, just quality of life stuff. I like using [Controlled Slide] because I don't like [Nezha]'s passive. It's up to you if you want to unlock this mod slot.

That's it for this build, thanks viewing it!
:D