I think it all comes down to how calm you are and how you kill them. (Not what you kill them with. The type of gun is insignificant). Like the way your guardian moves. Or proper Predictions. In that category. If some guy gets a positive kd but he's surprised he's getting the kills he's getting. You have to be confident that the moves you make are the right ones. Predicting your opponents is one thing but we have to remember that this isn't a guessing game.