The only advantage Iron Man over Doctor Doom is that he can fly and fire his weapons. But Doctor Doom is not a man in a suit. If Iron Man's armor is damaged and he cannot continue fighting, also on low battery power. Whereas Doctor Doom can go on fighting, he does not need battery power to keep him going on. In a hand to hand combat, Doctor Doom is most likely to defeat Iron Man, only if Iron Man keeps himself at a safe distance would he be able to severely hurt Doctor Doom. I think it would be a draw - because neither would be able destroy the other.