The important thing here is that Tony get two days of prep. That will allow him to invent or change his armor in a way that will help again Abomination. I mean the guy became a expert in thermonuclear astrophysics in one night... He invented a new molecule... He knows how the hulks power works, he will deduce that Abominations powers work in roughly the same manner and will act accordingly. And if his plan fails then he and warmachine gets ripped to shreds.