My Tacky-Ass(ault) support build.
This is one of 6 builds I run and one of my favorites. It's straightforward. You follow around, behind, beside, all over a D3 spamming Defib and laying down armor melting suppressing fire. D3's your mobile shield and you'll constantly be dodging bullets and diving for cover, suppressing and wearing down enemies and basically just softening everything up while they hide and focus on the tank.
Also depending on how much healing your group has I often switch 'Stopping Power' and 'Critical Save' around or 'Shock and Awe' for 'Steady Hands'.
Just as a FWIW type thing it's easy to get the SP pushing the soft cap of 450,000 with the 30% bonus Tact's, 15% from Talented, 20% from Death by Proxy. Which means your Defib beats out any reclaimers and your BFB with be pushing 1.25-Million with both Destructive and Predatory hammering away.