Cards part of the movement archetype with Hulkbuster added to make Human Torch's and Multiple Man's ability stronger, Hulkbuster can also be used for Vulture, Dagger, and Kraven as well to help with give them an extra boost to their abilities as well. Iron man fits into the for late game lane power pushing. Beast helps clear lanes for that Final Heimdal Movement he also works well with Human Torch and Iron fist making them zero cost allowing you to play iron fist on later turn alongside Human Torch to double his power at zero cost allowing you to use your energy for other plays that turns. Pretty low energy cost cards with low-mid power with potential to become very high-power cards in the late game.
Fisk Tower can pretty much completely nullify this deck, the best solution would to be to add a low-cost location changer like storm or scarlet (though you could use Magik, but she is a 5 cost)
Hulkbuster is your only power booster (besides the cards that buff themselves with moving) but you can add 1 more such as Okoye or Iron Heart to make Multiple Man and a few other cards in the base deck work a little better.