If this is for Battle Spot, then I don't think you're doing it right. Naganedel has a few good status moves, and it should be able to alternate between its status and attack moves, so choice items are bad on it. They usually hold dragonium Z in singles and focus sashes in doubles. For singles, you should replace dragon pulse with draco meteor and flamethrower with fire blast because they're more powerful. Thunderbolt doesn't cover very much, so replace that with nasty plot. For some reason, you're supposed to keep flamethrower in doubles, but replace the other moves with protect because every Pokemon needs protect, tailwind to speed up teammates, and sludge bomb to not hit teammates.