All energy weapons are good. Laser pistol is very good in PvE, especially leveling on high-xp encounters. AFAIK laser has different crit tables (better), and (maybe a coincidence) i, when lvling EW sniper, use laser pistol, not plasma pistol because it scores big crits and instakills alot more often. Plasma pistol aint bad either tho, large guaranteed damage, you dont have to rely on crits that much. Well, laser rifle is pretty much the backbone of EW and plasma rifle, altought sucky range, i guess aint bad either.
If you want to make enemies, try to change something.
well, t'ain't no craftable weapon...