Hi Mattyj. I've been doing the same thing lately. My Loadout is
Hi Cap Mag
I use this regularly against high levels and with enough strafing and ADS tapping I usually manage to out shoot them. The ADS really does a good job and keeping up with them, Hip fire is pretty decent at close range and by tapping the ADS when you have a straight line to someone results in a lot of head shots.
Hope this helps