Dump all INT and put rest to luck. 10 luck a must for snipers.
Since you're gonna be using laser rifles, you can get away with 8 PE+cigs+ sharpshooter since you'll have 53 sight range with this combo. You should probably take chem reliant for the 2nd trait. Don't take repair, tag doctor just incase you're in a battle with other snipers. If you're gonna use this for PvE I suggest taking gatling/laser rifle. YOU LACK BETTER CRITICALS, ALWAYS TAKE THIS PERK. DROP 3rd LIFEGIVER AND TAKE IT.
3rd lifegiver not worth it, especially with the lifegiver changes. You'll have 261 HP with only the 2nd LG and its enough for a sniper. RBTE is something I'm ehh about, I don't notice a difference when I had builds with it and builds without it.