Power-scaling arguments are often not a true reflection of any character’s strength or capabilities, and this is even more true in Jujutsu Kaisen where a sorcerer’s creativity with jujutsu concepts matters more than an arbitrary ranking of strength. Possession of cursed tools, knowledge of barrier creation and even hand-to-hand combat expertise all influence any particular battle’s outcome to some degree.
Source:https://www.cbr.com/powerful-jjk-cursed-techniques/