@Mu7e
If you have Magic Seeds, use them. If not, go buy some. You see, Magic Seed grants you Attack buff (one stage) as well as King's Shield for one turn. Teach your Blaziken Bulk up and now not only have you increased your Attack, but also Defense and Speed. Fire-type is not super-effective on Steel in the Fairy-tale field, so you should use High Jump Kick. With all of this said, Excadrill is still going to be a problem, so I suggest you get rid of it or let one of your mons get knocked out before bringing in Blaziken - that way you can make use of the one-turn KS the Magic Seed provides you.
I personally like both Diggersby and Bewear as they're useful in this battle. Diggersby's Earthquake (with Huge Power ability) deals massive damage and can even OHKO several of her mons. Bewear on the other hand can deal very well with her A-Sandslash: Brick Break is enough for OHKO and it removes Aurora Veil should she go for it. Bewear and Diggersby are Normal-types, meaning Aegislash can't use Shadow Sneak on them at all, and because of the field effect Sacred Sword isn't super-effective. Diggersby might still get OHKO'd, but Bewear can take one or two of those. I'd say Diggersby is still the better choice against Aegislash because Diggersby outspeeds it, and can use STAB Earthquake.
To be honest I don't see Noivern or Crobat being very useful against her. Even if you taught Noivern Flamethrower, I don't think it's going to do all that much aside from potential chip damage on her Scizor.
Edit: forgot to add that Smart Strike gets super-buffed by the field effect, so this might be something you can try yourself. Escavalier could make good use of it.