1. She should be able to summon 100% katsyuu. to do this, she would need enormous amounts of chakra. which is why i think hashirama or orochimaru should have given her some senju chakra. idk. that's the only power up i think would fit her and put her top tier. slug sage..even though it doesn't exist for sure, would be kinda lame...compared to 100% katsyuu.
2. she'll get a senju power up for sure. something like the thing pein used to revive the villagers. her hair will turn white (which is linked to a lot of things in the manga) and releasing another seal, one like hashirama's. Naruto is, in fact, in a dire situation. What would be the ultimate op healing jutsu? Samsara of Heavenly Life jutsu of course. Except she has so much more chakra reserves than Nagato now with her seal and all. i think she may rejuvinate Naruto, Sasuke (if he's really dead. if you ask me, it's genjutsu with his ems or something), and the rest of the shinobi army that may have passed. Will it cost her her life??? who knows? it would be an interesting turn of events though.
2. she'll get a senju power up for sure. something like the thing pein used to revive the villagers. her hair will turn white (which is linked to a lot of things in the manga) and releasing another seal, one like hashirama's. Naruto is, in fact, in a dire situation. What would be the ultimate op healing jutsu? Samsara of Heavenly Life jutsu of course. Except she has so much more chakra reserves than Nagato now with her seal and all. i think she may rejuvinate Naruto, Sasuke (if he's really dead. if you ask me, it's genjutsu with his ems or something), and the rest of the shinobi army that may have passed. Will it cost her her life??? who knows? it would be an interesting turn of events though.