The WORST Skitarii ACD build (viewer discretion advised)
 Skitarii Build - Warhammer 40k: Darktide 

As of making this build ACD is still bugged with every keystone (10 stacks from powerdrive on 2+ stack usage which is good for us, Advanced power management not working at all which is trashing this keystone), bugged at general usage, losing extra stacks, not gaining capacitance from kills (Higher purpose, Reactor coil don't work) at hit regs etc etc.
But the things that ACD offers to the table are fun enough to use and consider some unorthodox (im sorry for saying that, Omnissiah) talents and usage. 

This build is centered around plasma gun for 2 reasons - You can make its damage shine pretty hard with stuff like Rad-sink, cleave and crit chance from ACD, and second, "cooling down" special action stopping your ACD timer. This is the base you can work around for making a good ranged Skit build on any charged shot or hipfire weapon.
ACD itself is an insant cast that drains only a quarter of your current charge, so any toughness generation talents related to ability use will shine very bright on it, (like Restoration protocol) as well as "Power overflow" allowing you to share excess you get with teammates, we put it a lvl higher with "Voltaic restoration" node near the claw, and "Invigorating Overload" allowing us to both, provide generally good and quick ACD restoration to our whole team, or even dump all of our charge trying to save or cover teammates by force spamming them shields.

As of weapons and blessings, power falchion just fits ranged build with its power during charge uptime, but feel free to use either Transonic blades (good horde), Claw sword (good elite protection) or Arc Maul (good general CC). You can use try using shattering impact instead of either of plasma blessings, but focusing on charged crit shots makes it ammo efficient, as well as ACD not going down during cooling allowing to space shots and save on gauge.

Flex talents - "Target prirotisation psalms" (insane visual help, but not purely attack talent), Invigorating overload (stamina regen from it is hard to value for now, with voltaic restoration feel free to swap it for something else), Rad-sink (very good on plasma), Powerdrive (we can use it pretty well with ACD so i would not recommend dropping it, but if you don't die much and reach overload stacks well, might consider getting more damage). 
Flex talents to take - "Calculated priority" (You can stack it pretty well, and its A LOT of damage), "Reactor-Coil Recharge" (doesn't work during ACD so a bit of a letdown, but it will help returning to 3 stacks). If you ready to drop 2 talents go either Servo-core recharge>Progressive matrix or Electro-strike/auto-repair>galvanized coating