Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
1-4% Toughness for every 10% of magazine spent during continuous fire. Stacks 5 times.
A lot hammer builds use shroudfield ability or foot keystone. Hammer sucks, and the reason is its low attack speed. So the key to use it well is increase the attack speed, that we can do by dash and wounds.
Advantage:
Disadvantage:
This build require high skill I think. You can replace Invocation of Death by Second Wind for more survivability (check second run in the video)
P.S. Video FPS and quality are low, I dont know why(