Arbites
19-25% Impact for 1.5s on Hit. Stacks 5 times.
10-25% Damage vs Electrocuted enemies.
7-10% Reload Speed for 4 seconds after Close Kill. Stacks 5 times.
14-20% Strength for 5s when every pellet in a shot hits the same enemy.
Just a tanky build I slapped together. Works well for me. I'll sometimes swap Rebreather for Engage depending on what I'm doing, but I've found it to be a build with very good survivability in a support role.
The build focuses on high stagger and cleave to keep toughness and damage resistance up while minimizing damage done by enemies you've engaged, by keeping them staggered.