Toughness Battery
 Skitarii Build - Warhammer 40k: Darktide 

This is a very usable support in Auric. It is not Havoc tested yet. Optional changes - Swap 'Arc Grenades' and 'Voltaic Motivator' for The 'Noospheric Command' if you lack a Specialist/Elite killer on your team. Magnacore Mk3 can be swapped for the Mk2 or a crit-revolver, but you will lose out on easy Hoard clear and the amazing aoe stagger the Magnacore Mk3 can provide with the strength blessings.

The concept: Passive Toughness through Self-Harm. Causing damage with 'Ablative Wards' seems to trigger all modifiers that you would receive from external damage sources. Passive Toughness - Through 'Power Overflow' you're able to provide 25% of excess toughness to your team ever 15s and 'Ablative Wards' triggers ever 20s. - Main Damage Triggers 'Data Sensor Protocol' restores 25% toughness and 'Kinetic Energy Distributors' restores 25% toughness, also 'Auto-Repair Doctrines' restores 3% toughness just to top it off at 53% passive toughness every 20s. Then 25% of that 53% gets added to anyone on your team missing toughness through 'Power Overflow' (Wish it was Gold Toughness). Active Sources - 'Slaughter Protocol' toughness 25% - 50% on Melee Kill. 'Entropic Transfer' 12% toughness on Electrocuting, this one is nice because there is a lot of electrocution happening although this one maybe better spent elsewhere.

The Play Style - Channel your inner Zealot. Crit isn't an issue when you have 'Flensing Protocols' stacked. Bleed and Electrocution gives boosts to your damage and can CC anything you're focusing. You need to try and keep your Capacity around 1 or less to make full use of 'Slaughter Protocol', this in combo with the toughness regen in the relics and the 'Resurgence Aura' make a constant stream of toughness coming in at all times for you and your team. 

The Tank - thanks to the ample Damage reduction nodes that people seem to overlook, you can face tank gunners while slashing away, these are thanks to 'Progressive Plating Matrix' 15% DR at full stacks - 'Residual Current Buffer' 10% TDR (+2.5% per stack) -  'Galvanized Coating' 15% DR - 'Power Redistribution Uplink' 15% TDR on Crit - finally 'Adaptive Combat Engram' 30% DR for 5s only on toughness break. 80% Resistances when you need it most. (I did leave out 'Flensing Protocols' 20% TDR at full stacks because the constant losing and restacking when taking damage).

 Optional Swaps - 'Sureshot Cogitator Sync' and 'Reactor Coil Recharge' instead of 'Entropic Transfer' and 'Voltaic Motivator' - Still testing, feels about the same, but feels good for boss killing.