Continuously chaining more than 2 attacks gives +2-5% Power. Stacks 10 times.
Up to +5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
+10% Critical Chance for every 0.2-0.35 second while aiming. Stacks 10 times. Discharges all stacks upon firing.
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.
You can use any melee of your choice. You won't be needing "Suppression Immunity" if you have Executioner's Stance. Because Exec. Stance has a built-in suppression immunity.