I just reread the spoilers...unless Redon is as blind as he is thick skulled about gender crap we should hold on with the power scalling. He is ASSUMING that Yamato is using conquerors because of the lightining, but it might just be the passive type of conquerors clash like when Luffy clashed with Doffy and Chinjao
And that makes sense since she unlocked it around the same time that she was cuffed, so she probably never learned how to use it, so Zoro and Luffy are ahead of her in that regard since Zoro can use it if he goes all out and Luffy is in the process of mastering, and with Sanji's new power up we might actually have the 3 of them roughly around the same level