User blog comment:IamJakuhoRaikoben/Chapter 292: Combine The Thoughts, Review./@comment-3422455-20120721154155/@comment-3290324-20120721164108

I doubt it. I think the reason he didn't is because GrayxRufus, GajeelxRogue, NatsuxSting, LaxusxOrga, and ErzaxMinerva were all expected fights. Even if Mirajane is more powerful than Natsu, Gajeel, and Gray. >_>