Ogryn
Target receives 1-4 Stack(s) of 10% Damage if already Staggered. Lasts 5s.
Hitting an enemy gives them 1-4 stacks of 2.5% Brittleness. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
Your Grenades stick to Ogryns and Monstrosities. 6-15% Damage vs Ogryns and Monstrosities
1-4 Bleed Stacks from close range explosions.
Melee special + L1 and repeat...for everything. That's it.
Range weapon choice is sub-optimal here, but was chosen simply to interrupt enemies, apply stagger and bleed, and allow the slap monster to get in close to continue slapping.
I know this build seems silly, but it's the most fun I've had in a long time on this game and the build actually makes fairly easy work of Auric Maelstrom and upper Havoc (though I don't play much of that and you'd want to switch ranged to GG or heavy stubber).