Idk if anyone has given you a genuine answer so I’ll try to. It seems like you’re trying for too many different game plans at the same time, I think for example, zabu might not be as strong as he used to be but he’s especially weak once sandman is on the board and you can only play one card per turn. Also mr. Negative isn’t very good without any cards that have a lower power than cost. If I had to adjust this deck I would focus on either making it a negative deck, with iron man and other low power, high cost cards (iron heart, rogue, Adam warlock) If you’re trying to make the deck with with negative over anything else I think the most important part is to focus on cards with lower power, or cards that help you draw more flipped cards like Adam warlock or magik so that on turn 6 (or 7) you can drop as many cards as possible by surprise