This is my [Qorvex] build that I regularly run Netracells and all other high level content with.

A critical part of the build is that I run two Tauforged Blue Archon Shards for Health [Regen] and have a melee weapon equipped with [Life Strike] (which is more of a last resort, as I use this as a weapon platform).

I also run two Tauforged Topaz shards for + damage to radiated targets and a regular Amber Archon Shard for Casting Speed.

The gameplan is rather simple: keep your Disometric Guard up and set your Chyrinka pillars up on either side of you (or opposite ends of the room, or two different doorways, or on either side of a defense objective) to spread Radiation status effects. Between enemies focusing on each other and the passive health [Regen], you should stay nice and healthy as long as you help to thin the crowds. Use your Crucible Blast as needed to "dodge" through strong attacks (you can activate the ability again to end it early) or as a room clear.

My weapon loadout for Netracells and generic content is:
[Strun Prime] Incarnon with Radiation damage (for ease of getting extra Disometric charges on the move)
[Lex Prime] Incarnon with Corrosive damage
Zaw Stat stick with Life Strike and Tennokai for faster heavy attacks(/items/arsenal/2238/helios/) Armor strip with Vicious Bond and Deconstructor

Substitutions:
If you are playing in a planned group, you can easily take [Combat Discipline] as your aura instead to provide some passive [Regen] to teammates as you can regain 15 health a second, so it doesn't hurt at all.
If you forma your aura slot, you could also use [Growing Power], as it is very easy to proc.
If you want to add a subsumable I have used Gloom previously, but I found it was unnecessary due to the health [Regen] from the Archon Shards; no matter what subsumable you choose, Containment wall is probably the correct choice to remove. I prefer it for grouping to line up group kills with ammo-inefficient weapons, but I know that is not everyone's cup of tea
Against non-armored factions i.e. Infested and Corpus your companion doesn't matter, so choose your favorite doggo, kitty or robot.

I don't regret spending two Umbral forma on [Qorvex]. He has overperformed every time I use him. On endless missions, he can easily handle up to level 2,500 with fear of dying (tested in SP Circuit with no defensive decrees)

Future Plans:
Max out all mods on the loadout
Max out Arcane Blessing, as the extra health is always nice to have
Considering [Catalyzing Shields] to allow him to better use [Hunter Adrenaline]
Switch out for Primed Versions of mods as available