Extra Crispy
 Skitarii Build - Warhammer 40k: Darktide 

Max stacks of flense are going to have you hovering around 30% crit chance as base, mag dumping the arc gun into pretty much anything is going to increase your crit chance to about 62%, meaning you proc charmed reload, feeding into the mag from your reserves. 2 in every 3 bullets, more or less. You can sustain fire without having to reload for minutes. It'll pretty much delete anything.

System shock will proc up to 4 times, giving everything 40% brittleness. Crits and elite kills will keep your toughness constantly regenerating and your capacitance charging. Waves of ragers can be swiftly dealt with with an axial slash when they get into range. If any crushers or bulwarks make it to you, holding chord claw will let you steal their face and they'll get embarrassed and go home.

For monstrosities, get the 40% brittleness with the arc gun and then try and steal their face too.

The power sword is your backup weapon and hoard clearer. It feels a little unintuitive at first, but channelled motive force and shockline breech protocols give you a substantial amount of dps boost and cleave, letting your proc decapitator very easily if you start engagements with the push attack. This weapon is a head hunting machine. 

For mobs, PA>L4>H2. Then cycle L4>H2 indefinitely once motive force and shockline are active.  

For armour. PA>H3>H1>L2. Then cycle H1>L2 with block cancelling for fast and direct headshot damage. 

The push attacks proc motive force for 15% extra damage and getting 3 elite kills will proc superiority for 30% extra damage. If you get a 1 hit kill, you've also proc decapitator for 24% extra headshot and crit damage that can stack up to 120%. Sureshot cogitator sync also just gives you a flat 25% headshot bonus damage at all times. L1>L2 or H1>L2 are superb headshot attacks and you should very easily be able to take out pretty much whatever is infront of you with one shot. If you need some help with heavy armour, you always have chord claw which I'm pretty sure benefits from both decapitator and superiority if you have your sword out. Or you can cycle in empowered attacks. H1>L2 both good options for empowering. 

Realistically, the move set is very versatile and you can mix and match a ton of different attacks for any situation. But the above are a good starting point to get into your muscle memory. 

This build is a monster. It doesn't have super long range, so snipers and gunners at distance can be a problem. But anyone close to mid range is going to be having a bad time.