You can go with LK & INT & PE 8, while adding hawkeyes to have more sight and living anatomy for bit more crits (but living anatomy unnecessary imo), this would allow you add stats into other special. If you're planing to use only sniper weapons and no other, than you're making kind of glass cannon build, really easy to die when people come near you but owning on distance (there you should go with higher LK&INT which will probably make you use less AG/ST which will make you easy to drop weapons and be shot to the floor). You won't really always be in opened spaces (since there aren't that many people playing so you can just pick a spot and ambush, also you'll have to chase your target, nobody will wait till you shoot him 2-3 times with sniper) thats why I suggest keeping them at 8, so you can still be viable with a handgun (or some rifle) for close space combat, while investing some points into defensive abilities to sustain some damage. Also then you could use sneak with handguns or sneak weapons (needler,wazikashi) to ambush inside buildings, while playing regularly as sniper.
Gifted sucks (because you'll either invest all points you get to gun to make it to 225 or in some other skill, impossible to raise 2 especially 3 skills with gifted on useful level), unless its highly specialized build, which is waste in game of such diversity.You can always go with traps instead of sneak, put loot on the floor, put traps, wait till the guys cripples himself, finish with headshot.