Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
Fully Charged Heavy Attacks ignore Enemy Hit Mass and have 2.5-10% Damage.
5-8% Strength for every shot fired during continuous fire. Stacks 5 times.
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.
If you are trying to get Onslaught Penance. Do not use this build. Only melee kills count towards the penance. Not kills procced by bleed or any other source (ex. Haymaker blessing)
The idea is that you fully charge your melee swing on Relentless strike to capture as many chaff to bleed. Bleed increases your resistance. Using taunt on push procs Payback time to get more damage and more dangerous bleed damager per tick.
Against elite and certain armored, using Box nades for crowd control along with rumbler to create brittleness stacks. Once you get the first elite kill, it usually gies you enough rending (Dominate talent) to proc relevant bleed stacks. Just don't overestimate the Unstoppable force blessing as that doesn't work on Armor mass (I tthink?)