Non-Keystone Burn-CC-Support
 Veteran Build - Warhammer 40k: Darktide 

A kind of a hybrid damage-support build that i have been running and it got insanely buffed in the latest patch!

- Munitorum Mk I Sapper Shovel -
Fast attack speed, high innate stagger potential and a very simple attack pattern.

Dump Stat: Defence and/or Mobility

Perks : 
"+10-25% Damage vs Flak Armoured Enemies", since there are a looot of enemies with Flak armor on various parts of their body.
and
"+4-10% Melee Weak Spot Damage", since light attacks is a "Strikedown" attack its easy to hit melee Weakspots.

or

"+10-25% Damage vs Maniacs" to kill them faster after you knocked them on their ass.

Blessings:

"Hammerblow" - +19-25% Impact for 1.5s on Hit. Stacks 5 times.
This blessing turns you into a mini-Ogryn! You will make most enemies stumble around with Light Attacks and play golf with Heavy Attacks! 
It is really satisfying seeing enemies that are normally taking hits like an Anime antagonist after a power up but then all of the sudden he gets knocked around by the new guy with a small shovel!
Use Special Attack to Weakspot Stagger the more stubborn enemies.

"Skullcrusher" - Target receives 1-4 Stack(s) of +10% Damage if already Staggered. 
The shovel has a high attack speed so its easy to add those "8 stacks of +10% Damage". Takes 2 hits if you have "Skullcrusher IV". 
You Stagger a lot with each hit so the blessing will be active most of the time. More damage for you and the team! 
Perfect synergy with the "Hammerblow" blessing.
 

- Accatran Mk XII Recon Lasgun -
Dump Stat: Mobility

So this gun is such a beast after the last patch!
Insane rate-of-fire, a lot of ammo and decent accuracy, not that accuracy is that important with this kind of fire-rate heh.
 

Perks:
"+10-25% Damage (Flak Armoured Enemies)". More damage to the most common armor type.
"Increase Ranged Critical Strike Chance by 2-5%". More damage, more Burn and free ammo!

Blessings:
"Headhunter" - +2-5% Critical Chance on Weak Spot Hit until your next Critical Hit. Stacks 5 times. 
"Infernus" - +1-4 Burn Stack(s) on Critical Hit to a maximum of 3-12 Stack(s). You want this to be Rank IV!

- Talents -

Sooo we got a couple of synergies in this build, the talent "One Motion" to be able to more quickly switch between weapons since the Recon Lasgun has a slow-ish pull animation and you want to switch between them a lot!

Then we got the talent "Shock Trooper" that makes the shots that critical hit cost no ammo.
So you want to go for as many Weakspot hits as possible, so the "Headhunter" Blessing activates, giving you more and more crit chance until the next crit!  (just aim roughly around their head/neck and you will be fine.)
Then with "Infernus" blessing, every crit hits add 4 stacks of Burn up to 12 stacks at rank IV, its damage over time and it will melt everything!

Then we got the talent "Onslaught", it adds a 2.5% Brittleness de-buff on the target for each melee or range hit, stacking 16 times, lasting 5 sec.
So with our insane rate-of-fire it takes less than a second to add the max of 40% Brittleness to the target, thus removing 40% of its armor! More damage for you and the team!

Then we have the talent "Keep their heads down!" and with the changes to suppression it has turned in to something truly amazing! 

See that line of small shooters hiding behind a fence, chipping away at you and your teammates toughness? Just fire a line across the fence and see how they all stop shooting, hide or run away! You don't even have to hit them!
Same with Gunners, they take a bit more but you will notice how fast they will stop shooting, cower in place or try to run away!

A group of Reapers? Just fire and after a second or two you will see how they all cower in place!

You will also suppress that random tiny bastard that comes close to your cone of fire, i have lost count on how many times i notice one randomly just standing close to me cowering in place.

- Curios -

As for curios i chose to go for 3x +Toughness just cause we have such an high toughness Damage-Reduction with "Close Order Drill" + "Iron Will". 
3x "+1-4% Combat Ability Regeneration" to shave off up to 3.6 seconds from "Voice of Command". (This one is open to what ever you feel like you want and it wont hurt the build.)
3x "+5-20% Damage Resistance (Gunners)" for all those pesky Gunners and Reapers.
3x "+6-12% Stamina Regeneration" Since you want to be able to reposition faster and you sprint faster when you have stamina.
I skipped "+Toughness Regeneration Speed" since we have the talent "Catch a breath" for passive regeneration,
"Confirmed Kill" for Toughness on Elite and Special Kills then "Voice of Command" to instantly restore all of your toughness.

#Edits after testing