Based on the video by Tactical Potato, but modified to be lower cost.

The original build had 7 forma on it, which I don't want to spend on an initial Nekros because I'm still early in the game.
Steel charge to get the most capacity - original build had [Growing Power].
No exilus, original build had [Cunning Drift].
[Intensify] used instead of [Umbral Intensify] from the original build.
[Continuity] used instead of [Primed Continuity] in the original build.
[Vitality] swapped instead of [Health Conversion], because I don't have [Health Conversion], and I want to test this out with some more health.
[Transient Fortitude] dropped out, for capacity and because I don't own it. After these changes, [Augur Secrets] fitted perfectly into the remaining slot in order to get back some of the strength lost from removal of [Transient Fortitude].

instead of Grendal's nourish, I used [Mag]'s Pull. This was based on availability.