Dresden takes this, I mean if his shield bracelet can block 3-4 bursts of fire from Mustang that should give him plenty of time to come up with something. If you thought D&D wizards were a pain in the ass, well... Dresden is basically that only on steroids.
Dresden has enhanced reactions as the Winter Knight, and extensive experience both using and defending against far more potent fire than that described - while exhausted, wounded with hawthorn, and carrying multiple broken bones, and freaking naked, he managed to generate a shield against a wave of fire the size of a city block. So, yeah, he stomps this fight. Can we just call this one as a Dresden victory? It seems there's a pretty broad consensus.