An improved version of DieselßaddAss's "[Inaros] the Endless Sandking" build that doesn't throw away 2 of your umbral forma for nothing.

This build can be made on even less forma:

If you don't have Prime [Sure Footed] don't polarize the exilus slot and use [Handspring] instead.

If you don't polarize the aura or exilus slot the build only costs 1 forma. I recommend [Corrosive Projection] and [Handspring] if you go that route.

Regarding the rank 0 mods:

[Adaptation] will still scale to 90% at rank 0, It simply takes an extra 10 shots and lasts for 10 seconds less. This isn't a problem for [Inaros] for obvious reasons.

[Umbral Intensify] at rank 0 because we aren't making use of the strength for anything, We just want it to boost Vitality and Fiber. If you don't want to farm the 100k Simaris rep you can do two things:

-Use 1 Umbral Forma, Swap Hunter Adrenaline for Rage & Spend another forma for a D polarity on Adaptation
or
-Use 1 Umbral Forma & Swap [Quick Thinking] for [Gladiator Finesse]