Veteran Commando - The Problem Solver
 Veteran Build - Warhammer 40k: Darktide 

This build is focused heavily on taking care of priority targets and bosses. If you're looking for a build that allows an agressive close quarter playstyle with very good clutch potential, give this build a try. 

For melee, I like the Devil's Claw MK IV, but you can use whatever weapon you want. You already have a lot of tools to deal with elites, so I recommend something that can take care of hordes well. I also recommend the new chainsword, but I haven't played that much with it yet. For now it does a really good job and help with elite killing in melee. 

For ranged, I really like the revolver with this playstyle. It's ready to shoot instantly when you equip it, so you can use Agile Engagement fully. That talent synergize really well with it, giving you easier acces to some breakpoints on specials and elites. +25% maniac should get you to the 1 shot headshot breakpoint for trappers, and the +25% on unarmored to the 1 shot bodyshot on dreg shooters. Remember that the revolver pierces, so it's best to line up shooters with it to save ammo. It also pierces specials and most elites on headshots, so try to line them up to get some sweet multikill action. Crucian Roulette is more reliable than Surgical with this playstyle, since you should not really wait for it to stack up before firing. Speedload will proc all the time so you will get a lot out of it, and it balance the fact that we can't really afford to get tactical reload without sacrificing another talent. You can also replace the revolver with a shotgun of your choice. The gameplay will me pretty similar.

I go down the middle of the tree first to get krak grenades, which are really amazing on pack of elites and crushers. It's also you main boss killer, since we take a lot of perks that will synergize with it. Sadly, I prefer the movement speed aura, but we can't get it without sacrificing the ogryn/boss damage talent and the CDR on special kill talents.

Since you don't have great ammo economy with the revolver, you should really aim for headshots, and if possible try to hit as many enemies as possible with you shots. You will use Infiltrate to reposition, close the distance on elites, revive teammates, have better angle on multiple headshots and boost your damage. Remember that you will drop the aggro on your teammates for around 10 secs when you go invisible, so make it count. If you just use it as a get out of jail free card and don't help your team during it, you're just an ass. Sometimes this playstyle will make you go in the backline, but be sure to be able to get to your team if shit hit the fan for you or them.

If you want a more clutch oriented playstyle and don't mind the loss of damage on bosses you can opt out of getting the talents in the bottom of the middle tree and instead go the Movespeed aura route, the extra points will allow you to get Tactical Reload, Leave No One Behind and Out For Blood, making you better at reviving and surviving alone.

Hope someone enjoy this build as much as I do!