Not good fast shot works only with weapons that can do aimed shots.
Let me suggest this char.
SPECIAL: 6 7 8 3 6 9 1
TRAITS: Kamikaze, Good Natured/Fast shot if you add some to sg
PERKS: Awarness, Bonus move 2*, Life Giver, Bonus rate of fire, Action boy 2*
SKILLS tagged: Big guns, Science, Repair
End vaules without sg skills: Big guns 200, Science:100, Repair: 120, Outdoorsman 82
With Nuka cola you can burst 2x but even without that you can fight effectively in PvE. You will have 11+4 action point without drugs.
End vaules if Small guns used (gun runner sg boost is taken): Small guns 101, Big guns 184, Science:100, Repair: 120, Outdoorsman 82
Both char can trade and buy one mercenary to carry the loots with mentats 2. High action point gives you chance to run away and thanks to kamikaze you have 19 sequence which will let you attack 2x if you start the combat (in PvE).
Side note if 1-2 PvP char enters your encounter, you can easily win if the map has obstacles (city ruin, trees, mountains).