I'll be using everything. Everything given to me.
If it's one thing I've learned from my many dead-is-dead playthroughs, it's that every specialty has a weakness at some point in this game. My NCR guy died in Dead Money because my guns jammed and failed to be effective on Ghost people, my Legion guy died because the giant Roboscorpion is immune to all unarmed perks, my BoS playthrough died because there's just not enough energy weapon ammo to rely on.
My only playthrough left is my Courier Six playthrough, which utilizes everything, and I'll be damned if I change my strategy now.