ST 5, En 2, Pe 10, Ch 1, In 7, Ag 6 Lk 10
Traits: small frame, kamikaze
Perks (in a row): Awareness, More crits, Better crits, More Crits, More Crits, Living Anatomy, Sharpshooter.
With this build at level 21 you would have, 45 carry weight, 8 AP, about 84 hp, small guns little above 200%, repair 121%, science 90%, outdoorsman 40%, fa about 75% (for 84hp its enough), doctor 80%, so i think you could do well. For this build to learn sg gunsmith lvl 3 you would need to buy 1 nuka-cola for 3 caps.
You could have 1v1 edge with this build in ecounters on turn based, if you start fight then you get 2x head, eyes or whatever aimed shots that would allmost surely fuck enemy hard, and only finishing him would be remaining.