Here is a general purpose build with no investment.
- I keep a level 6 Blind Rage around for several builds where I don't want 0 efficiency but do want more ability strength.
- The Umbral/Primed mods are fine when replaced by their normal counterparts (Allowing you to grab a higher ranked Rage or Blind Rage).
- Primed Sure Footed is not necessary for Nidus as Parasitic Link prevents knockdown and stagger, and we don't dump Range.
- I take Teeming Virulence because I like seeing the gun do red crits. Any of his augments are fine and it's truely a flex slot.
- Grace and Victory are not really necessary, but they make his ability to survive a lot more manageable before you are setup.
- I use Rifle Amp here to show that the extra from Steel Charge is unnecessary (If you would rather use a different Aura like Corrosive Projection). Using Steel Charge allows you to max one of the other two mods.
An Aura and Umbral forma are an easy adds to this build.