Still looking for more opinions on fixing my darkness removal deck?

Take out cards like Pot of Avarice, Monster Reborn, and Premature. This is a removal deck so working in your graveyard isn't really something you need to concentrate on. Use more Macro Cosmos and return cards like Dimension Fusion and Return from the Different Dimension. Maybe a Soul Release or two. Oh and a couple of Bottomless wouldn't hurt. Use Dimension Fusion with Spell Economics and when your opponent summons their monsters destry the ones above 1500 attack with Bottomless and then deal good damage.