If u have quick reactions, it helps; but otherwise, work on reacting fast by quickly aiming ur reticle on opponents at any range & situation accurately. The aim gets funky when descending from a jump, aim in just before hitting max jump height and drag reticle 2 the direction they're facing if not on target. A must with a sniper. Hip fire at all times b4 zooming in completely if u have an auto, scout, or pulse rifle to land a few shots in & give opponents wobble. this helps slot when jumping as it not only confuses your enemy, but can cause them to hestate/panic. Memorize where the aiming center on ur screen is without relying on the reticle. It'll make u a force in gunfights and react much faster through muscle memory making it look as if ure cheating by getting far quicker kills - This is extremely valuable when using a sniper when rushing with it or making jump shots or mid air shots. One of if not the most valuable thing u should get a habit of is always have your aiming center in the direction where opponents are likely to be or will be. Always be aiming at corners, ledges, and color changes/movements in the distance. Its essential in any shooter, combine arial shots with this and u can land far more hits than u think. Get used to moving your thumbs quicky from analog to buttons depending on your set up For aiming, have your right thumb "roll" over your analog for extra precision, while using your entire thumb movement quickly for larger movements/adjustments. I like to blink jump in place or to the side to get an advantage on others while shooting. It helps a lot more than u think, especially jumping out of a corner which can mess with an opponents meta XD Just be aware where your center aiming is at all times, especially b4 going airborne.