I highly suggest getting 90 repair, the perk 'Jury Rigging' helps so ridiculously much. Your gonna want 100 Guns and Sneak, for obvious reasons, but everything else is really up to you. Stats Your stats can vary depending on how you want to play, mostly depending on if you're on Hardcore or not. Agility is obvious, and Luck is the most important stat because you're gonna need ten for critical chance, which you will be able to get to 100% with the sniper rifle. Just maxing out four or five skills is enough, especially cause those other SPECIAL points are more useful in other stats. Intelligence doesn't need to be any more than 4, because you will only be able to max out one more skill with 9 intelligence instead of 4. This is really all you need, the intelligence and charisma implants aren't really necessary. 7 Endurance will be enough to get you the implants for strength, perception, endurance, agility, luck, more DT, and healing over time.
6 perception is enough to see red ticks on your compass from a decent range without ED-E. However you do need 6 perception for the Better Criticals perk and ED-E will be able to die in Hardcore. YES NOED-E making perception completely useless on core for snipers, because ED-Es perk 'Enhanced Censors' makes you able to see red ticks way before the computer even draws the baddies on your screen, even with 1 perception.