Yamato who fought equally with Ace in her base form was about to use her devil fruit against Sasaki and some people think Franky is gonna beat him lol
Sasaki and Who's Who are at least above the likes of Snack
Dp you even realise why she was gonna use her df?
It's not because sasaki is strong.
It's because she had to finish it quicker and protect Momo.
Base yamato trashes Sasaki upper mid diff.
Unless you think sasaki > jinbei/Supernova Ace/G2 and g3 luffy which is cap.
Jinbei >= whowho > sasaki