Hello Hello fellow tenno, it's Instantea here with a [Nidus] build!

• [Steel Charge] as the aura because it gives the most capacity, if you don't want to use it, [Corrosive Projection] or [Growing Power] works too. (if you are using [Corrosive Projection], +1 forma)

• Umbral mods are OP in general, but on [Nidus] they are godly, and you might ask, "why not [Umbral Fiber]?" well, to put it simply, you already get good damage [Redirection] with parasitic link, which you should try to have on at all times, that you don't really need too much armor, but the option is there if you so desire to use that mod. (If you are using [Umbral Fiber] +1 forma)

• Power strength at 225% because going further isn't really necessary because you can do good damage without going above 225% power strength.
(you can replace augur reach/[Stretch] if you want to equip [Blind Rage] anyways and if so, +1 forma)

• [Rage] is here since [Nidus] gets infinite energy when he gets hit since he doesn't have any shields, and [Adaptation] is there to tank damage and to survive and thrive.

• 175% Range for a good pull range with larva, the more enemies to pull, the easier it is to kill them, and the more stacks you make per cast of your 1.

• Duration at 127% to give a good length to parasitic link and ravenous, which are both very good abilities to stay alive with and for support.
([Augur Reach] can be replaced with [Constitution] or [Augur Secrets] if you want more duration)

• When it comes to arcanes, most of the "good" ones work just fine. Arcane grace, [Guardian], energize are all very solid options, and if you play [Nidus] for the pull, you can even use arcane strike.

• The exilus slot is very optional and not mandatory, (it's just quality of life stuff for the most part). I personally always use [Primed Sure Footed] because I [Hate] getting knocked down, but it is a very expensive and long to get mod, so it isn't in this build. (however, if you are using [Primed Sure Footed], +3 forma, 1 dash for [Augur Reach], one V for [Rage], and a D polarity in the exilus slot)

A lot of flexibility on this build, and I encourage you to experiment with [Nidus] yourselves to find the perfect build for your playstyle, as this is just a simple build and guide of what to put into [Nidus].

That's about it, enjoy [Nidus Prime], and glhf tenno!