I'm not sure Dragonfire Inspiration would be that useful in this build. I'll only have Inspire Courage as a level 7 Bard which isn't even enough to get me a +2 bonus. I suppose I could boost it with Words of Creation and items, but that is another feat invested that I might not have room for. I'm thinking I'm going to need more feats open that I can devote to metamagic to make the best use of Incantatrix.