The Stormwrought - Thunder and Fire Build
 Psyker Build - Warhammer 40k: Darktide 

Thunder-bringer Scriers Build - "The greater the difficulty the more glory in surmounting it. Skillful Psyker's gain their reputation from storms and tempests."

Born under a sky that would not stop breaking. This Psyker was born with the thunder in his breath and the will to challenge fate....

• The Tempest Staff (Equinox Mk III Voidblast Force Staff) - The Storm made manifest. A versatile AOE staff racking up the stagger and suppression of a tropical cyclone. Use primary fire for any specialists or lone gunners with the secondary aoe for mass groups of hordes. Blazing Spirit and Warp Nexus keep entire hordes altght with the wrath of fire, and ully charged attacks put even Crushers on their backs. In most situations, Rending Shockwave is usually overkill once they’re down; follow with the secondary while they’re still trying to stand. Keep the charge high. Let it break.
• The Aftershock (Agni Mk Ia Shock Maul) - A versatile tool in your hands, Push-Heavy-Heavy is the main tool of wrath into a horde with Heavy-Light-heavy into any carapace that has been knocked over by your Tempest. The special is good to stun the occasional crusher or mauler and especially deadly into captains shields don't forget!  
• Stormcall (Scrier's Gaze) - Keep the Tempest flowing strong! mainly used for Warp Unbound, allowing you to spam out as many changed shots as you like into massed hordes. The thunder does not need to last forever. It only needs to hit hard enough, if you time it right you can likely go back into scirers gaze after those 10 seconds thanks to Seer's Presence and...
• Warp Siphon - Here purely to keep Scrier’s Gaze off cooldown, In Fire Reborn and Blazing Spirit maintain the stacks easily while the horde burns. The lower the cooldown, the sooner the next storm can be called...
• Brain Rupture - Only really here for the extra damage provided by Kinetic Flayer. Peril belongs to the staff. Use it only when something at range needs to die and the Tempest cannot reach it in time.

The greater the numbers, the more the thunder answers.