I max Small Guns ASAP and then promptly start increasing Energy Weapons with whatever points I can spare. When I start getting a constant supply of Plasma Rifles, I get my hands on A3-21's Plasma Rifle and then I barely need another gun. A3-21 at max Energy Weapons is a valid choice against all enemies in the game, not to mention that by the time you'll get your hands on it, you'll have looted so much ammo that it's ridiculous.
So yeah, I start out with Small Guns, then use Energy Weapons almost exclusively.
So yeah, I start out with Small Guns, then use Energy Weapons almost exclusively.