This is a TVHM Mayhem 3 mobbing build based around Terror mechanics' amazing synergy with the Shredifier AR. If you watch Moxsy videos, you've see what this synergy can do, but my Shredifier is better overall. It's a cryo Shredifier with "While Terrified, deal 50% bonus cryo damage", so paired up with Amara's elemental build traits and gear, this Shredifier puts out more overall damage than in Moxsy's demoed build. Even better, this is a "shotgun" Shredifier, so you can keep it in rifle mode and are far more mobile than in Moxsy's demoed build with the tripod stabilizers.  And yes, this Shredifier has a 159-ammo clip in this build!

The skill build itself is based on Moxsy's best elemental grasp build, which means this is a linked grasper, and it works GREAT with the Terror-Shredifier synergy! However, since reloading is not an issue with the Terror-Shredifier synergy, I moved 1 point from Alacrity (blue tree) into Root to Rise (green tree) instead for even more max Health.

Gameplay loop:

Before a new encounter starts, fire Grasp at the ground to instantly proc Terror on yourself. Then whip out the Shredifier and melt everything. 

The skill element by default is Incendiary, for bonus 18% Incendiary damage  and converting 40% of the Shredifier's cryo to Incendiary. This doesn't hurt the rate at which you freeze enemies at all! If you're going to go up against a wave of armored enemies (like the last round of Slaughterstar 3000), just swap over to Corrosive for your skill element. And FWIW, for normal mobbing the Cryo Shrediifer melts through armor just fine, even with the skill element set to Incendiary.

Note: The Searing Hellfire makes for a GREAT utility swap for when you're fighting purple annointed that are immune to cryo. Hit them in the face with that 17/s fire rate and you'll still get slows and freezes on them as you grind them down with fire. This puts out more DPS than an incendiary MOARR Linoge pistol and is accurate as heck. ^.^