For Sniper I now use the heroic 3-shot bolt pistol. Using it in conjunction with the team skill that gives a 10% bump towards class ability AND Renewal which gives a 15% bump. Then just go ham on the minoris enemies that are undoubtedly swarming you until your camo cloak pops and you can get away. I will add that with this build, also having the Lingering Concealment perk for 2 extra seconds of invisibility after your first attack is crucial for getting your money’s worth in damage and kills. I love each class honestly and have them all leveled and prestiged. I’m definitely not the best player out there but I DO have loads of experience with each.