I know people think Vigilance is great for sniping but if you think about it, it sucks

! You hide in buildings with a door, or half a wall blown away. Say your a SEAL and you snipe in the white building on the left that you need to blow through, how in the hell would you hear someone come in? Or in the small rooms with doors, someone with an M14 can kick down the door and just blow you away before you pull out to 3rd person. But, the best levels for sniping I think, are Sandstorm, Blizzard, Foxhunt, and Sujo.