Man, you must choose, if you are going to be a sniper, you got 2 choices, 10 luck, finesse, more critical, and even more critical, that way it would be a crippler, every shot in the eyes adds a +60% chance of critical, +10% of finesse, +15 of perks, +10 of luck would leave you with a 95% critical chance on the eyes, and a shot in the eyes can insta-kill anything, not regarding the hp of the person, there is a chance of insta-kill, but if you plan to be a non-crit sniper, well, that will surely don't work, I advise you making a burster, with an assault rifle, or if you are going to actually do a sniper, make a crippler with those perks.