Veteran, but it's zealot (knife finesse veteran build)
 Veteran Build - Warhammer 40k: Darktide 

Let's break it down.

You wanna play shroud field zealot but your team wants field improv? Do you like taking half proficiency? Are veteran builds too hard and you want something simple?

YOU'RE IN LUCK!

Knife veteran is here to prove to your friends they're only dying as veteran because they are bad, with this build you can finally play the sniper class you always wanted to.

See a gunner? 

BANG, it's gone

See a mauler? 

BANG BANG BANG, and it sparkles like new 

But oh no, my hive scum ran off and got himself hit by a mauler overhead, and my skitarri is being guarded by 4 gunners and I need to rescue them.

Worry not! Infiltrate let's you rescue your teammates, do objectives, and generally get from point A, to point B without even a scratch on ya

And in case you feel like you wanna get smoke grenade penances or you struggle with large hoard worry not, this build is flexible, and will take any veteran grenade without fuss.

Call now and we'll throw in a free complaint from your teammate for not using voice of command, that's right call now and your next teammate will complain in chat about you throwing by not using voice of command, that's nearly no added value!

Call now, before this offer runs out 

Warning, we are not responsible for issues caused by

-lack of aim

-inability to dodge

-loss of ammo due to not running scavenger

-general skill issues

-and other such symptoms