The Londoner (+Flammenwerfer Enjoyer) (Tested)
 Zealot Build - Warhammer 40k: Darktide 

Inspired by a build @Cheese made on Youtube.
"The PERFECT Knife Zealot | Warhammer Darktide"

Made for personal use, check out his video for higher quality builds, and a more in-depth explanation.

General Information:

This build is a generalist that's weak into range and relies on the Blades of Faith  blitz for dealing with specialists.

Using Shroudfield, this build is exceptionally good at clutching, especially with the Catachan Mk III Combat Blade's high mobility that allows you to outpace hordes, as well as most enemies. There's no crowd-control, but the build is still decently quick with taking out trash enemies, even without the Artemia Mk III Purgation Flamer.

The Catachan Mk III Combat Blade with this blade struggles against Crusher enemies, unless backstab maneuvers are integrated, otherwise they are easily dispatched with Shroudfield. It's better to just let your teammates handle Crusher enemies, so you're not overextending to kill them yourself.

This build is most weak into monstrosity enemies, although still does acceptable amounts of damage. Think of yourself as being a jack of all trades while using this build, you're exceptional into nearly everything, but you're a master of none. And taking the full quote into consideration; that's oftentimes better than a master of just one.

Changes that can be made:

Depending on the difficulty you're playing at and your skill as a player, you can trade some defensive nodes for offensive, and vice-versa. There is also some quality of life that you can trade out for more toughness, or damage output.

The most RECOMMENDED change though, is that if you're on console and using a controller, you can swap out the Blades of Faith with the Immolation Grenade! It sucks most of the time to use the blades, especially because of how most of the controller schemes are!

I KNOW SINCE I'M A CONSOLE PLAYER!

(Note: My first mission testing this build was on an auric shock troop gauntlet, and I was forced to clutch like ten times because two of my teammates ditched me. Holy fucking shit that was stressful.)