Darkness - the best friend of the sniper. Have no fear, however. Even with an entire gloomy map to haunt, they usually settle on a single corner.
Sniper Nest #1: You've run and jumped past this spot a million times, but the sniper lurks here forever.
Sniper Nest #2: Not far behind the first spot, and right above the location of the rifle itself. Clearly, anyone wanting to avoid a sniper's bullet should avoid the central hub as much as possible.