i think this needs dropped down to 30-35 cards and add quints, 1 copy of the creatures with maybe graboid being the exception.
With the steam machine, golems, and fire eater all struggling for fire quantum something within these 3 creatures have to go, they just dont go well together. If not then your mark is gonna have to be fire. The only thing your entropy mark is doing is fueling a single shield that if destroyed makes your mark useless.