Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
3.5-5% Strength for 3.5s on Hit. Stacks 5 times.
Direct hits apply 1-4 Stacks of 1% Brittleness for 5s. Stacks 20 times
5-8% Strength for every 10% of magazine spent during continuous fire. Stacks 5 times.
Without martyrdom, the hammer cannot be used. I think this particular build is needed.
I think this is the best priest build, though it requires finesse (skill) and it does not/cannot use chorus, which does have a lot of utility. Try to have a chorus priest or shout vet on the team.
Try to have at least 5 chudcel rage (martyrdom) stacks
The hammer cannot cleave well, so the flamer must be used