Early game is a bit rough this way, but the end game is so much easier. However you'll be about level 14 by the time you get to that point. then you're good to go into Guns and Sneak. Then get Bartering up to 70 (a bit rough to do). Then get Lock Picking to 80(90) as fast as you can so you can get a pretty nice sniper rifle early on (I personally suggest run through a lot of stuff and going straight to Vault 3 early on (Kill a fiend and wear their outfit so you don't have to go through a ton of them early on). Anyway, start of the game and get Guns & Sneak to 40, that will be enough to shoot from afar and not be noticed. I don't really like that kind of play style, simply because I have to take time to line up the shot, however, there isn't quite a feeling like taking down a whole base from afar and they never even get close to you. This build is entirely meant to bring down the opponent in 1 shot, from a distance that VATS would be completely useless. It's not a great attacker, but it's sensors are useful and it's a nice pack mule. Early on in the game you can use ED-E until you get someone else. Also, I suggest going to Vault 3 and getting one of theirs suits since it gives +5 Repair & +5 Lock Picking. Not to mention Boone or Lily can be replaced by Raul, who has a pretty nice revolver for close range. You only need a magazine and skill 30(40) to start building them, or just 50 in general. The reason I don't have Jury Rig on there is because of the Weapon Repair kits you can build.
If my adding is correct (and you're using Comprehension), you should be able to get it by level 6. It's one of the more powerful snipers in the game, and is fairly accurate. Up there is a very hard weapon case that holds a slightly above average sniper (can't remember the name). Then get a Lock picking magazine, go to the sniper perch near Cottonwood Legion Camp. If you want, you can bump back Bloody Mess to level 8 (or if you're playing Hardcore, not bother getting it at all until 28/30) and get Comprehension instead. After that go after nothing but Lock Picking. At the beginning of the game it will be kind of rough but you start out with around 40 Gun and Sneak skill (after getting to level 2, you up them to 40). 30: Intense Training (STR or END) This build is primarily meant for being far away, and picking off things before they know what hit them. 2: Confirmed Bachelor / Black Widow 4: Educated 6: Hardcore-Comprehension Core-Bloody Mess 8: Hardcore-Strong Back Core-Comprehension 10: Finesse 12: Pack Rat 14: Hardcore-Entomologist Core-Shotgun Surgeon (this is a back up for if they get close) 16: Better Criticals 18: Tag! 20: Adamantium Skeleton 22: Toughness 24: Toughness (2) 26: Lady Killer / Cherchez La Femme 28: Intense Training (STR or END) I lean towards STR.