Ogryn
5-8% toughness on Chained Hit.
5-8% Strength for 4.5s on Kill. Stacks 5 times.
Your Grenades stick to Ogryns and Monstrosities. 6-15% Damage vs Ogryns and Monstrosities
5-8% Strength for every shot fired during continuous fire. Stacks 5 times.
I think this is ogryn's strongest build right now, it does disgusting boss damage while having great ammo economy thanks to Back Off!. Worth mentioning Light 'em Up is bugged with the rumbler currently and isn't stacking properly. You could take Bullet Bravado and Hail of Fire, but I like putting those points into Spray and Slay and Bulletstorm. The boss damage between these options is nearly identical as long as you get a lucky bullet proc (Which you should from Back Off!), while having uptime outside of Point-Blank Barrage and buffing your teammates ranged damage too. Krourk Mk IV Cleaver with Confident Strike makes you nearly immortal in melee, just spam light attacks when you need toughness and do L -> L -> H or block cancel when you don't need the toughness. Keep an eye on your buff bar and pull out rumbler for a quick free shot from Back Off! whenever you are at 9 stacks, or earlier if you need the aoe stagger asap. Rocks are there to kill muties and other specials, I think That One Didn't Count is very strong and feels great, rewarding to hit heads and doesn't feel bad when you throw a rock at a special and a teammate shoots them first.