Zealot
Weakspot Kills and Critical Strike Kills reduces Heat by 4-10% over 3s.
Reduces Heat buildup by 3-6% and increases weakspot damage by 1-4% for 3s on chained weakspot hits. Stacks 5 times.
Ranged hits add 1-4 stacks of bleed to enemies.
Target receives 1-4 Stacks of 2.5% Brittleness on direct projectile hit. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
The Locke Mk IIb Spearhead Boltgun is best for groups of Ogryns and Monstrosities. Everything else is handled by the Munitorum Mk II Relic Blade. Horde clear is Push attack > Heavy > Heavy > repeat or Push attack > Heavy > (Heavy > Light > repeat). Single target is Light > (Heavy > Heavy > repeat) or Light > (Heavy > Light > repeat). Opening with a sprint attack is ideal, but not always feasible.
The Locke Mk IIb Spearhead Boltgun has three spots to animation cancel the reload: one the moment the magazine comes out (ammo drops to 0), again as the magazine is sliding in (just barely before your character taps the mag), and finally the moment your character pulls the slide back (ammo goes back up). You can cancel these animations by sprinting briefly, throwing a knife, or swapping weapons.