For assault rifles I'll usually have them unsilenced and i'll use: bandolier, sleight of hand, and deep impact.
For sub-machine guns, I'll use unsilenced and silenced. For unsilenced it's: bandolier, sleight of hand, steady aim. For silenced: bandolier, uav jammer, and steady aim.
For sniper rifles, I use: bandolier, overkill, and deep impact