Although, if you look through the George Tuska issues, Tony was pretty vincible when it comes down to it. Over in the Avengers he totally kicked ass, and then in his own book he was being whipped, melted, shot at, had chunks of his armor falling off at any provocation, constantly running out of power and falling to his knees and having his butt handed to him by the likes of Mikas, the Soulfather.
Yikes. Being an Iron Man fan was not easy.
Marker sketch, Copic Markers, Sharpie and Micron on Vellum