Havoc Armor/Boss Deleter
 Veteran Build - Warhammer 40k: Darktide 

Havoc BS based around deleting armor and high boss damage, so you only die to captains instead.  Good survivability with 274 non-havoc toughness at triple +17%.  SUPPORT ULTILITY - [Shout with toughness, +56% Revive Speed, +15% damage to whole team, 1.3x end multiplier to team.]  You are the primary Specialist/Elite killer and boss damager.  Since this build is based around killing Specialists and Elites I find Confirmed Kill to be more than enough toughness regen, especially with the base toughness damage DR. (Exhilarating takedown is bugged in the most recent patch and doesn't trigger a lot in online games, hence the build update) Plasma Gun headshots one taps all Specialists (besides mutie) when pinged, and all non-carapace human-size Elites.  FOCUS TARGET (FT) TRICKS - [When a pinged enemy is killed you are set to two stacks if under two.  This is a bug with Focused Fire increasing the stacks cap by 2.  Redirect Fire (RF) stacks are additive, if you had 3 stacks of RF, and kill an enemy with 2 stacks of FT, the duration is refreshed to 10 seconds with 5 stacks.]  Consistently pinging enemies between charged sword hits for 2 stacks of FT is still 1.1x damage to you, and your teammates, attacks.  You will notice using this build in the Psykanium that enemies are often left with less than 10% hp after some hits, this is where FT comes in, climbing over the breakpoint with just 2 stacks increasing your damage 1.1x.  The Kraks scale with the extra base damage plus FT really well, you can 4 nade monstrosities in havoc with all of your stacks up.  You can also one tap reapers with a charged headshot.  The only 4 enemies that can not be consistently one shot with the sword are Maulers, Reapers Bulwarks, and Crushers.

Example of how to play - Get 4 stacks of skirmisher up, for +25% base damage, with the +15% on Elites for +40% base damage.  Fully charge a heavy for 1.6x damage, and ping the enemy with FT for 1.1x to 1.3x damage before striking.  A strike that would have done 100 damage now does 291 against an Elite. (does not include other damage buffs or armor) Crushers are pretty easy 2-3 tap, Maulers are 1-2 tap.  Target Specialists over Elites, as they are more disruptive to your team, also why infested is taken on the plasma gun, to one shot bursters and dogs.  When you see an Elite swarm, just throw a few Kraks and watch them disappear.  Make sure to have a pinged enemy die before the 10 seconds is up on RF, 60% damage is kinda crazy.

I end up just fighting Daemonhosts when I see them in auric since you can kill them with 3 Kraks before they even move.

Kraks do 4800 damage, with a +75% and +20% damage buff, and a 25% base damage buff, with a 1.3x end multiplier, for 15,210 damage per Krak, with a 20% chance to throw two, resulting in an average damage per throw of 18,252, the ultimate boss shredder.  80% chance to kill a monstrosity with 4 nades.  You're in havoc and the twins + a monstrosity spawns?  What monstrosity?