The other Tony's distraction with Iron Man was an opportunity for Wanda and she took it, hovering behind him after leaving Pepper, to shot a hex bolt at his back. The air around him crackled and the temperature shot up, the only warning before a single bolt of lightning split a cloudless sky aimed at his head. Her only goal at the moment was to get him off Iron Man and split his attention in two. With Tony knowing his own limitations, Wanda actually thought this would be an easy fight (or no fight at all, since it was possible that the other Tony might actually want to return home), but that clearly wasn't to be. Tony went in it was clear from the way he took on the armor without any armor of his own that they had a real problem on their hands. It was foolish, apparently, to assume they had any real advantage here.