Flensing Menace
 Skitarii Build - Warhammer 40k: Darktide 

This is meant to be a hybrid damage/support build.

Nuance:

Merits: 

with Laspistol, this is HIGHLY effective for Spread Ranged Units, when ranged units are spread out instead of clusters they can shred toughness.This allows you to melt them regardless of spread or distance with ease while maintaining safety, easily one tapping elite gunner units. With the combination of ghost and defensive stacks from ranged kills this provides an immense level of both speed, precision, ease if use, effectiveness and safety.

Maintaining all of your ability and ranged kill based Buffs is exceptionally easy, press F and land a few headshots. Quickly activating flensing will retain its stacks instantly, so upon usage of Doctrines your crit and damage are instantly restored.

With the mechanicus Sword, the blessings offer very high crit which stuns any dangerous units in place. Preventing them from dangerous attacks, the mechanicus sword excels in Rager safety as well, stabs are VERY quick, very high damage and capable of delivering the electrocution effect consistently and switching to block upon stabbing is instantaneous as well.

As for now, spamming doctrines can be used to generate toughness for allies, preventing health damage on friendlies is a massive boon in the long term.

Still a WIP this is one of the first drafts of the build consensus:

Activating Advanced Combat Doctrines and switching to your melee immediately still qualifies as an ability use, even though you only spent 25 capacitance. Thus, it can be used nearly 7 times in a row for team toughness regen, or basically at will. This also maintains Flensing Protocol and Moebian stacks, or whichever ability usage based buffs, which we will get into.

Moebian Conductor: Gain 15% damage for 10s on ABILITY USE.
Voltaic Restoration: Restore 20% toughness to you and allies in coherency on ABILITY USE. Spam that to deliver loads of toughness to your team.
Enhanced Capacitance Protocols: Restores all Flensing Protocol stacks on ABILITY USE.
Sequenced Charge: Gain 12.5 strength on gaining a charge. Since you are often going to use a charge that ends in 75% capacitance, and combining that with the weakspot and 3-enemy hit cap charge, this will proc consistently.

Essentially, we are stacking:

Moebian Conductor: 10% damage 
Galvanic Array: 20% damage
Assault Doctrine: 15% damage
Flensing: 20% damage
25% weakspot damage
Spending 1 stamina grants 15% damage

With a whopping 80% damage, 105% on weakspot hits, and toughness regen for the squad in tight situations, capable of preventing serious health damage to them if timed correctly.

This brings a Mechanicus Sword light attack on a Crusher head from 241 to 535 with max buffs. I'm also seeing 4,000+ damage on a crit headshot to a Crusher head with the Phosphorous Pistol, so yes, it performs as advertised.

Last Stand plus Sinew gives a whopping 18% crit chance. Pairs greatly with mechanicus 20% crit on weakspot.

Laspistol:

Somewhat of a synopsis of what's stated: Ghost combined with Combat Doctrines allows you to focus on headshots, it makes ranged shield blitz basically redundant. And the Laspistol consistently takes 2 shots at most for almost all elite/special units when damage is fully stacked.

Power Sword

Basically 40% critical chance with blessings and talents increases cleave capacity significantly, and since there are long charge times for maximum damage, shocking enemies on light attacks with Electro-Strike conduit helps a great deal, and with very high consistency due to the crit. As stated, make sure to drag your swings and use the swooping attacks.

also regarding power sword

You want to drag your sweeps. A double-charged sweeping attack can stun multiple Ragers, and the charged follow-up is a massive damage headshot. However, this is can be difficult without good defense. Using charged attacks on specials is much easier in a group when aggro is dispersed. Don't bother with charged heavy stab unless you're sliding into something do a push follow up into a charged overhead heavy for massive damage, when they fix finess scaling this will be insane damage wise.

Flex

As for not having Noospheric Command, you ARE the Noospheric Command with your laspistol. Switch between either Medicae for downed clutch, or, alternatively, put it into Higher Purpose instead to generate significantly more capacitance for more ability usage.

Choose between the three talents that connect to Flensing Protocols for whichever one suits your purposes. Personally, I use not being interrupted on heavies because the Power Sword is a nightmare when you are stunned.

Galvanized Goading is reasonable as well. Since you aren't reliant on your ability, your capacitance is more expendable, especially with Higher Purpose's 5 capacitance on elite kill. So Cap gain aiding Noospheric Command usage consitently uses the same logic.