This is the successor to Bruiser Ninja D3. This build does not hit anywhere close to as hard as the Bruiser build. But it will far outlast it. A single kill will take you to the hard cap of 60% damage reduction. This means you effectively have 5.9 million shield health and your toughness is up a lot too. If you find you are tanky enough without that level of reduction, replace the 4 damage resilience mods with damage mods. This will give you damage just shy of a 6K firearms and 6K stamina build but with a way stronger shield as outline in this theory crafting thread.
The primary House is for NPC mobs as you'll proc kills often enough to benefit from Predatory being constantly active. The secondary House is for bosses/Hunters to keep up free healing while you aren't getting kills. This set up lets you play more aggressively since you've got your own minor healing train going. If there's a Reclaimer on the team, hopefully they can fire a heal at you when seriously needed (which can happen regularly if you are hyper aggressive). The Custom PF45 is a gear score 204 (optimized to 228) so that Coolheaded is unlocked. The purpose of it is to farm back Recovery Link (usually after picking up 2 other players). Since you can play at point blank range, it's pretty easy to land a pile of head shot's on a single NPC to get it back in a dozen shots or so (the damage is also so low that they don't generally die). Just let other players know you want that NPC alive as you're farming back your Recovery Link. Toxic can help with that if the blind status effect procs keeping the NPC in one place for you.
In a team, your job is *NOT* to block incoming damage to help keep teammates alive. That's the medic's job to keep everyone's health full and counter the incoming damage. Your job *IS* to flank the enemy and dislodge them from their positions and focus on you so they expose themselves to the DPS players who can mop the floors with them. You can sustain incredible amounts of damage that no one else on the team can, so use that to your advantage and break from the ranks to annoy the enemies. Just make sure the medic knows and can fire a heal your way if needed.
The support station serves two jobs. One is for drop, wait 10 seconds and then pop (this heals your shield as well). The second is to pick up another player without having to stop face tanking and shooting. Of course you can always point the shield at NPC's and stop shooting while you do a manual revive as well. If you're solo farming Resistance, then change the box to the ammo station and change Strike Back to Tech Support to keep the box up longer.
Note: the Reactive Taregting mod does not apply to the shield, but it is physically the biggest shield you can deploy, so it’s a better choice than the base shield for this reason.