I just completed Preoria (with my house's lights ON!!!) with the following posse:
My char (Str-6, Pe-5, En-8, CH-4, Int-10, Ag-10, LK-4, Gifted, Kamikaze, Tagged Small Guns, Big Guns, and Traps)
Farsight
Stitch
Rebecca
Jo (Why the HELL did I bring her?)
Stein
My posse has its standard issue as Hunting Rifles and AK-47's. Stitch rocks. When I has to go fight Roachor and get the last battery, I took myself, Stitch, Farsight, and Rebecca. He patched us up nice and good while we ran like rabbits away from the turrets. But why I took him was first, he's a good medic. Second, he's a good fighter. As soon as I got his Doctor/First Aid to over 100, I upped his Small Arms to 110. A lethal combo. This boy is lying prone with the other six, a screen away from a turret, and we're all letting it rain. 20 minutes later, we got a ton of Micro Fusion Cells. I can't stand those medics who have no combat skills. Can't stand anyone without combat skills really... Really, Stitch is best with the 9 First Aid Kits, 4 Doctor Bags, Field Medic First Aid Kit, and Trauma Pack I've managed to hoarde for him. That and his trusty AK-47. HE'S the one you call when you wanna castrate a Death Claw from 200 meters.