7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
6.5-8% Strength for 3.5s on Hit. Stacks 5 times.
70-100% Critical Weak Spot Damage.
10% Critical Chance for every 0.3-0.45 second while aiming. Stacks 10 times. Discharges all stacks upon firing.
Heavy or light attack 1, Heavy attack spam. That's your job. Hit the head.
Your infiltrate is not for shenanigans. Hit it when the horde is dense and you need to hit hard, or when you get overwhelmed and need to agro dump for a chance to get out or throw a grenade at the bulwarks or ragers that pushed you and re-establish control. Your pistol is for specials, mutants, and whatever else is unlucky enough to shoot at you. Swap to it, shoot a thing, any thing, it doesn't matter what thing, then heavy sword everything you can see and reach. It's really up to you what ranged weapon you use, but bolt pistol will allow you to activate weapon specialist a lot more easily while still giving good special damage and the ability to kill snipers with ease. All that really matters is you use your ranged to activate agile engagement and weapon specialist, and that it has good ammo economy. Revolver is okay, but only has 50 shots, so you're effectively spending double the ammo to activate your buffs even only using one shot.
270 toughness. You don't go down easy. If you want, drop rending strikes and take close order drill and confirmed kill and you'll barely ever take chip damage. If you want to play auric or higher consider dropping rending strikes and marksman for demolition team and demolition stockpile for more grenade regen. That will just mean your get out of jail card is a little less effective. If you want to do boss damage drop rending strikes, marksman and superiority complex, take bring it down and grenade tinkerer and suddenly your team mate running into the demonhost doesn't really matter that much with 3 kraks in its backside.
Shoot a thing with your bolt pistol, heavy sword, heavy or light 1, heavy spam. That's your job.
P.S. range on the heavy sword isn't great, but it cleaves like hell. You can get away with some close fights easily, but closing the distance can be a bit deceptive.