Featuring my new favourite, Cold Bore. With credits to @Hexxusz0r - feel free to drop any more Cold Bore nonsense in here as well
Mayhem 4 tested only, as that’s where I’ve been comfortable until recently. Getting a bit bored now, haha. As Cold Bore scales off weapon damage, the core of this build should actually scale pretty competitively with Mayhem levels.
My usual rules: no Seein’ Dead, barely using the red tree. I’ve been invested in barrier + drone since release and I’m not slowing down now. You’ll probably be able to do some truly horrendous damage if you invest in the red tree (particularly if you only go as far as CCC in the green tree, and use Seein’ Dead to avoid needing Seein’ Red).
Guardian perks are pretty average too. I could probably swap some blue points around; I don’t think I really need Salvation as I have Refreshment, but we’ll see. I could definitely drop a point in Violent Speed for Cold Bore, now I’m thinking about it.
My gear is what makes this shine. Face-puncher + Cutpurse for infinite ammo, plus two (!) Hellwalkers. Just swap between them for permanent Cold Bore, plus your kill skills for fast reload and Cold Bore for fast swapping. Fourth slot is shock Loveable Rogue, which is fantastic for melting boss’ shields. Shove whatever you want in there; the core is the Face-puncher, any Cutpurse Relic, and the Hellwalkers.
To round it out I have a MIRV Cryo Hex, a Transformer (because always Transformer), and an average Executor COM. I have terrible luck with COMs and Relics, so this build is by no means fine-tuned yet.