Critical Psyker (T5 Auric)
 Psyker Build - Warhammer 40k: Darktide 

This build abuses Scriers gaze and Disrupt Destiny to maintain high critical hit chance. Allowing you to deal high dps whilst maintaining maneuverability and an amount of tankiness not seen in most psyker builds.

Scriers Gaze - +20% Critical Hit chance... Need i say more? You wont be generating as much toughness with this class as both weapons are not warp weapons.

Assail -  This can easily be switched out with Smite if you prefer. This is exclusively used for high peril generation and its use in deleting groups of unarmoured enemies. As the duelling sword is only mediocre at dealing with hordes, it can help speed things up. Further, the peril generation is critical for toughness regen.

Laspistol - Using the quick draw speed of the laspistol, alongside the bonuses to critical hit chances the class and gun has, you can abuse high damage and accuracy (dont even need to aim with this thing) to efficiently kill elites, specials and even bosses.

Duelling Sword - This weapon can be switched out with the MK 2 Blaze Force Sword as both weapons function similarly. Allowing for high damage to Carapace armour, and even 1 shotting mutants, this weapon allows you to go toe to toe with Crushers and Maulers without fear. The Blaze sword functions similarly, however it staggers Crusherse whilst you hit, but takes longer to deal its DPS, so its a choice you need to make.
 

Curios - By hitting over 170 toughness, you avoid chip damage from basic melee attacks, and can tank a large amount of ranged damage before being at risk.

Key aspects - Kinetic Deflection, allowing you to go toe to toe with bosses and avoid taking any damage, and generate peril to regen toughness whilst in a fight. Warp Rider, 20% more damage on high peril and several other talents that are started on critical hits.