DOS version has the fixable difficulty bug and crashes a lot less (ok...DOS crashes less than Windows probably
). The Windows version added a blaster bug; not fixable to my knoweledge.
As for my weapons combos:
6 Heavy Plasma
4 Laser Rifle
2 Blaster/Rocket /w Laser/Plasma sidearm
2 Heavy Laser/Plasma Rifle/Stun Launcher /w Laser/Plasma sidearm