Electro Warrior
 Skitarii Build - Warhammer 40k: Darktide 

Tested up to Auric Maelstrom with great success. Not a big Havoc player, test for yourself.

I don't understand half the talent trees or synergies so quite happy making my own build and succeeding for a change. Main idea is just to sparkle all day long :) 5x charges, it only uses a maximum of 3x at a time. Use them to either speed up your attacks or in a big group of shotgunners to zap them down. 

Focus is very much on melee. Use the Arc Maul's special liberally whenever you encounter a good grouping of lights or a special that needs to go down fast. This build is overall oddly tanky, moves at a pleasant speed and deals out a good chunk of damage and still retains the servo skull for squad heals in tricky situations as well as hacking without needing to safeguard a player. Keep in mind that the regular way of getting people back on their feet is fully viable, the skulls are for mid combat assistance and if followed like that you tend to have one handy when needed while also not being a burden on the team's grenade economy.

Arc Rifle for more sparkles is functional but due to the lack of Gunsmith the Plasma Gun is favoured as it offers a high reservoir of ammo, allowing you to fire 2-3x shots, put it away and repeat two more times and then find a quiet moment to reload the whole thing.