Ogryn
Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
Target receives 1-4 Stack(s) of 10% Damage if already Staggered. Lasts 5s.
5-8% Strength every 0.4 seconds while aiming, stacking 5 times. Discharges all stacks upon firing.
24-36% Toughness on Critical Hit Kill.
Use the Grenade Gauntlet mainly for killing squishy specials with one shot. Can also be used for hordes when things get hairy.
Use Shovel's Special Heavy for Crushers, Bulwarks, and Maulers. It's capable of one shotting anything short of a Boss as long as you charge your swing fully.
I personally like to make sure I always have the Shovel in Folded mode. This allows you to quickly pull it out to one tap a lesser enemy or to have it ready for when a big enemy comes by.
Use Bomb's Away to cover choke points or flanks. You can also use it as a sort of stun grenade to give your teammates breathing room in tight situations.
Use Loyal Protector to aggro enemies onto you to give your teammates space.