Please help me with my demise OTK deck!?

I advise using a card like Draining Shield or Mystic Wok in case you have low lp and can't use Demise's effect. Wok would help if you tribute a monster Demise will destroy by its effect. Very strong, but I think Iron Blacksmith should be removed. It's too slow to get either Megamorph or Premature. Morphing Jar might be better.