If I was making a Vader suit for the disfigured and crippled Anakin with legs that are bigger and stronger than the originals, I would have stuck a few blasters on the shoulders and a built in lightsaber in each hand. And seeing as Vader never done the force lightning trick, I'm assuming he can't, so I woulda stuck some kind of lightning gun or something on there too. And knives and sharp sticks.