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She opens with these two.
This is the hardest fight I've ever had. Superheated field boosts fire moves, which doesn't help that her mons have massive attacking power.
Usually the Typhlosion opens with Eruption to hit both your mons for extreme damage. Not only will it do that, it'll turn the field into a burning field, damaging all non-fire mons every turn.
It's absolutely essential to set up rain dance to weaken her attacks and put out fires.