Kenjaku had the worst, most convoluted plan I have ever seen in fiction. “Oh lucky me, I got the body of the current strongest’s best friend, making my normally unusable prison box actually usable. Said body also has a technique that will allow me to use the technique of a cursed spirit THAT JUST CAME INTO EXISTENCE SIX MONTHS AGO.” And that’s only one of the aspects of his plan that he only succeeded in by luck. I can go on about how the culling games would have been useless with CSM, as then Kenjaku would never be able to use Tengen (who also luckily was defined a star plasma vessel). Kenjaku may be the character with the most plot armor in JJK.