VetRevolves
 Veteran Build - Warhammer 40k: Darktide 

making this specifically for the new revolver as the old one fits in with pretty much any build.

Power Sword - New revolver has essentially 0 cleave, and not great Carapace damage - this does both!

• Elite - Helps get to a 3 shot headshot on Crushers with the MK III, and helps deal with groups of ragers on the VI
• Crusher - One of the few enemy groups you can't one shot (crushers and maulers) and this allows for really nice 2-3 shot breakpoints depending on which MK you use.

Blessing:

• Surge - Massive cleave and huge damage increase, and we want to use heavy attacks anyway on the mk III. Brutal momentum is great on the VI as it allows light attacks to easily kill 6 mobs per swing for light 1/2 instead of 3~ doubling your horde clear potential. 
• Power Cycler - Unfortunately this blessing is still what makes this weapon functional.

Revolver XIV- We can one shot nearly all enemies in the game with a crit and ult.
Perks:

• Crit Chance - since we don't have surgical we need a little extra to help make crits more consistent.
• Maniac - without ult it can be difficult to one shot flamers on body shot crits, and will help vs Ragers and Mutants. Elite is a good alternative.

Blessings

• Surgical - Normally you are only getting 1~ stack if you are shooting quickly, but thats still 10% crit chance and similar value to Crucian. HandCannon is fine, but Power Sword should be killing crushers so would much rather consistent crit one shots vs all other enemies.
• Crucian - More crit for massive damage - revolver really needs crits to do high damage.

Executioners stance very critical part of the build, not only does it trigger a bunch of extra damage, it also increases our accuracy and reduces recoil making the new revolver much easier to use and get headshots with.

Marksman allows for two shot headshots (crits) on Mutants, and allows for Scab Rager 1 shot head shots. Also lets you one shot head shot flamers without having to crit which can be nice as you won't have to ads for consistent Flamer kills. At 10 stacks it is a 31% damage increase on headshots and even more on crits.
Camo is far from necessary, but it does make building stacks very easy at the start of fights as any time you stop moving (or if you slide) you will gain a stack. 2 head shots will basically always net you 10 stack. Trench Fighter, Tactical Reload and Marksman are all viable alternatives. 

Grenades - we got ALL the grenade talents for a simple reason; power sword struggles if you are getting overwhelmed, and you need a "oh crap button" to bail out your melee weapon. So we want a lot of frags so we can do this regularly. 
We can get rid of Grenadier and the 5% crit (even though both are really good for the build) for Tactical Awareness or some Keystone talents and/or Tactical Reload for faster reloads.