First of, my condolences.
So, you want to go the backstabby route?
In that case, sooner or later I'd suggest getting an Electro-Pistol.
Levelup points can go into both Dex and Perception, though you have to be extremely careful given your low health. You'll probably want both on 10 or 11.
You don't have much in the way of crafting, either; not sure if the point of int is worth it.
Later on, you can skimp a bit on dodge and evasion as they synergize, granting enough bonuses to get to max anyways.
You didn't list WIL, so I assume it's 3. That's a valid choice, I suppose. Should you ever have the points, it can be worthwhile to get electrokinesis anyway for the stun option.
Perks that incapacitate and help exploit weaknesses will be very useful to make the most of that stealth, and additional gun bonuses can't hurt, either.
I recommend Opportunist, Cutthroat, Gunslinger, and Execute.
You also want nimble.
As for unarmed: A real unarmed character is only feasible with Psi, where you can effectively hit a target 30 times a round. Otherwise, it's about combat gloves.
Others will be able to give more substantiated tips, I haven't played stealth since my first forays into the game.... a long time back.
