Set aimbot to neck or chest. Set aimbot to aimkey, I have MOUSE4 on my mouse but I guess you could use any key that doesn't interfere with your regular CA set up. Leave at 180degrees. Set to visible only. Don't touch switch after kill, auto-aim, and friendly fire. Don't go balls-off-the-walls with aimbot.
Do whatever you want with visuals, just don't be obvious when chaming.
Use no recoil/spread and unlimited stamina. When no r/s, tapfire with high recoil weapons from long distances and don't fire non-stop for long stretches of time. With unlimited stamina, stop periodically. Don't touch anything else.
I stay pretty incognito with this