Try playing private match FFA rust with your mates, DOUBLE health.
For me and my mates, its "spot, aim, and shoot." We mostly use burst rifles, and most of our precise aiming come from a sturdy elbow-to-hand/controller stance, steady thumbs, and a sensitivity that best fits you.
Another option is to buy the special, enhanced aiming analog sticks called FPS Freek. Just go google it.
HAHA i ordered the FPS FREEKs last friday. I was expecting them yesterday but i didn't get them and I'm still waiting today hopefully they will get here sometime tonight. I think they would have dropped them off but no one was home so they didn't.