I get asked this a lot and here are my best tips: - never challenge the same spot more than once if you miss your first spot move on chances are you will get killed by enemies expecting you to return to that spot especially hardscopers - try and keep sights at head level and strafe side to side to compensate enemy movement, it's easier to strafe side to side than up or down because you will rarely have to adjust the right analog stick - try to not challenge a hardscoping sniper! I see this way too many times where people die challenging a guy hardscoping undercover he know's where your head is :) - try to avoid tight spaces where shotgunners are more at an advantage - get a good sniper! Simple mechanic but one of the most important - lastly try not to challenge if you're weak / absolute it's best to stay alive to challenge again than trade :)