Psyker
Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
5-8% Strength for every 10% of magazine spent during continuous fire. Stacks 5 times.
Gain between 3.5-5% and 14-20% Critical Chance based on current level of peril.
Viable on both Auric and Havoc 40. Melee use whatever you want. MK4 duelling sword dump stat is either mobility or cleave damage. You can change Thrust for Riposte or Agile. I've seen a lot of people in my region (Asia Central) use Agile, but personally i don't need it.
You can swap Essence Harvest / Soulstealer to Quietude. It does not affect gameplay. I use Kinetic Deflection so i can revive team mates or keep peril high while boss aggro.