Are you part of the AoP discord? It might be good to ask there.
Off the top of my head, ballistics is useless for SG, armor efficiency isnt a good enough buff to take really, and lifegiver is too small an HP bonus to waste a perk on.
Try taking Adrenaline Rush, Nerves of Steel, Toughness, Bonus rate of Fire, man of steel, and hemostasis +PMS defence