Hello.
This is build is core for playing via Sandstorm + its augment.
Cheap build requires 1 forma to do extra Naramon/Madurai (or Umbra) polarity in addition to initial 1 Naramon and 2 Vazarin of Inaros Prime, 2-4 formas to complete the build.
Gameplay and final build depends heavily on your preferences and feeling the [Flow] of this skill. But here is the core idea: Range priority, suitable Strength, Duration+Efficiency+Energy balance, Survivability and Utility.
Huge detailed guide about this ability, Helminth builds, useful synergies with links and some extra information : https://redd.it/k7cw3c