I'll throw out a crazy idea just for fun. She's gonna use the 8 gates and byakugo simultaneously. So she'll get massive boost in strength and speed while byakugo regenerates the damage caused by the 8 gates to her body.
Something that is able to be even better than Creation Rebirth or Heavanly Transfer Technique, Senjutsu (hinted at in Part I and II as the same circle pattern on Sakura's clothing is the same design on Hashirama's forehead when he uses SM) or some sort of Genjutsu.