The suppressors can be replaced with tyrant or small suppressors for critical chance but because smgs already come with increased critical chance I went for crit damage to increase self preserved healing. The loud vents also increase threat which is what I was going for. The sidearm required more crit chance so gave it the tyrant suppressor. Plenty of things can be changed for preference. Defib with dmg reduction after reviving an ally can work too if your teammates die, but with enough threat and survivability you should be able to take the heat for them.