Ayy thoooo teach me how to get good at snapping with dat sniper tho. plssssss. Also mayo is groooooosss.
I'm not an ace sniper, but I did pretty well in S1 until I dropped them for Octobrush and have trying to learn to use them again in the last few days, I'm now consistently getting 5 kills each match reaching 10 fairly often, 0 deaths and ranking 1st or 2nd in turf painted. Though I'm still far from being able to carry a team like I can do with other weapons and still miss a lot of easy shots. Anyway, what I've found has helped me improve my results a lot:
-Don't camp. That makes it easier for the enemies to avoid you. So try moving around a lot. As an exercise, force yourself to change location after firing 3 shots, even if there aren't enemies around and you're just painting turf. Shooting reveals your location and that makes you vulnerable. Changing locations frequently makes it harder for the enemy to avoid you, how will they do so if they don't know where your shots will come from?
-Try to stay alive. One thing that makes snipers a great asset for a team is that they provide a safe jumping spot, but this only works if you manage to keep that spot safe from enemies and aren't constantly respawning.
-Always have a path to escape. Snipers either shoot or move, so if an enemy is getting close just flee to another location where you can snipd him before he gets in range.
-Take the center. If you can hold the center of the stage you'll become an awesome asset to your team: you'll stop the enemy from advancing and you'll provide a very nice jump spot. Besides, you'll get a lot of opportunities to snipe people coming at you from the front and be constantly repainting turf. This is where a sniper truly shines.
-Lay down roads for your teammates and block the enemy. Maybe you see a friend fighting someone but you can't snipe the enemy. Try laying some ink to increase your teammate's mobility, or shoot right next to the enemy to impede his movement.
-Aim away from the enemy as the shot is charging, then put the crosshair on them and shoot. This way they won't see your line of sight until it's too late.
-Use your specials, Ink Curtain helps a lot to stop enemy advance and hold the center, basic bomb is better to deal with enemies who are too close (in these situations use them to help you escape).
-Aim where the enemy is going, not where they are. The best snipers read enemy movement and anticipate it. This will make your shots hit much more often.
Hope it helps!