Noospheric Command Tank
 Skitarii Build - Warhammer 40k: Darktide 

This is by far my favourite build for the skitarii. I regularly reach over 800k damage in aurics while also being the tankiest skitarii in the team. I've also completed a Havoc 40 with it. Forget about using your ability, just keep marking target for your servo-skull to kill. All of Skitarii's abilities except maybe the Chordclaw are less impactful than just spamming Noospheric Command on every elite and special you see.

It works best if you have an auto mark mod. Your servo-skull becomes a turret with nearly 100% uptime and you can just focus on staying alive and killing enemies in melee.

Curios

Don't sleep on health curios. With this setup you have 144 toughness and 245 health. Your constant toughness replenishment mostly makes up for the reduced max toughness. With Ablative Wards, you become really tanky, especially against poxbursters. I've only taken one revive speed perk because most of your reviving will be done with Medicae Servo-Skull. With 3 toughness regen perks and Resurgence, you're constantly replenishing up to 7.125 toughness per second.

Combat Blade

Electro-Strike Conduit and System Shock make Uncanny Strike somewhat overkill. Adaptive Combat Calibration gives it a little more cleave but if you want more you could also take Shockline Breach Protocol, but I've found this to be a little overkill.

Ranged Weapons

I was initially using the Phosphor blast pistol but I found that I was wasting ammo shooting specials that my servo-skull was already killing. I decided that the plasma gun was more optimal as I'd just save it for big groups of elites and it's a little more ammo efficient.