If Hinata can keep her distance, she should be able to just blow him with Air Palms until his body can't withstand it anymore. idk
I highly doubt she'll be able to do that when he's faster than her...
Also, he tanked hits from Kakuzu's Elemental blasts, Hinata's air palm (Without Kyubi cloak) isn't going to phase him that much...
If Hinata can keep her distance, she should be able to just blow him with Air Palms until his body can't withstand it anymore. idk
Hidan's tanking feats are irrelevant against the gentle fist, as Kakashi said that no matter how strong one's outer body is, they can never train their inner organs to become stronger, so gentle fist attacks will always have the same result on every body.
Hinata's air palm is much stronger now, so it should work.
Gentle fist revolves around damaging organs. Hidan isn't hindered by destroyed organs. Therefore, Hinata can never beat him.
Or closing chakra points, so there's that as well she can use against him .