1. Ulti (Tanked a Thunder Bagua & a Maser cannon prior to her defeat to Nami)
2. Linlin (Won't really consider her awakening a nerf as it isn't confirmed whether she has it or not. Just gonna assume she doesn't have it
. She did have an Advanced CoC nerf tho, so an AP nerf)
3. Sanji (He took quite the beating from Black Maria and then had to fight whilst carrying Zoro and then got his ass kicked 2 v 1 by King & Queen prior to his climax fight with Queen)
4. Kidd (He took quite a bit of damage from Hawkins ability prior to his 2 v 1 with Linlin)
5. Sasaki (Oda did him dirty with the belly weakness ting)
6. Kaido (For someone that has nigh god tier durability and can fight for days on end, the argument that he's nerfed coz he fought so many people makes no sense to me. Particularly since most of the damage he received was minimal save maybe Zoro's cut but even then it doesn't seem to be hindering him in any way like was the case with Luffy and Law v Doffy for instance but well it is what it is)
*Zoro (was only nerfed momentarily due to Enma going berserk from Hiyori's shamisen but soon after it led to his PU which enabled him to beat King so not really sure it constitutes as a nerf)