In my opinion, you would probably be best going with a burster.
With bonus rate of fire, you can burst twice per turn with 10mm SMG/P90c. If you also take an Action Boy, you can burst twice with the Grease Gun/Assault Rifle.
Going as a sniper is pretty pointless since your luck is 1.
50% Repair is good enough for the first level of Armorer, Small Gun and Big Gun professions, which could be fairly useful.
You could get the second level with 100% repair, but things at that level require blueprints, HQ benches and mats, if your willing to do that.