The purple FA mods can be swapped for 3% skill haste 267 FA mods if you can't reach the required 3832 FA for Destructive and Hurried. Swap shield damage for damage resilience if you find your shield going down frequently.
Pistol should be from a lower world tier so you can unlock Coolheaded.
You should mainly be using The House for damage, swapping to the MP5 only to keep Predatory active.
Box is mostly for repairing shield, can be swapped for CC (e.g. Flashbang). Sig skill can change if necessary.
Combat Medic is the only essential Talent since it can repair your shield - Precision should be swapped out if you have a teammate with a strong pulse, One is None can be swapped if you don't find it useful and Triage can be swapped for anything you prefer.