Kitsuchi destroys her, especially given the intel.
>Elevating the earth around him avoids any acid mist, which he has intel on.
>Doton shields block any Suiton or Yoton.
>Kitsuchi was appointed commander of the close range division, which implies he specializes in close range combat despite of feats. His reaction and speed is suitable enough to hit a V2 Kinkaku... safe to say he destroys Mei in CQC.
>Earth Sandwich one shots at any time Kitsuchi feels like using it.
Only way Mei stops this from being a near stomp is if she uses the Hidden Mist off bat to conceal her location, and attempt at Zabuza-esque tactics. Still, Kitsuchi can raise himself above the mist or even a huge surrounding area carrying Mei above the mist as well. That or large scale earth sandwiches crush her eventually.