5gojosa
for the jujustu world i would sugest maybe doing a few cross overs like maybe putting chainsaw man in another section of japan were they use cursed energy in a different way to use the powers they have in that manga maybe you could get away with fusing bleach in since you could cursed spirits are a step before someone turns into a hollow
If you touched on the subject of grimoires, you could generate missions to worlds like Danmachi, black clover, trinity seven, fairy tail, apart from not generating missions that are only battle since you have quite a lot of ops in your group, or find some way to exclude them of the mission. your story is generally going well, thanks for writing and sharing it.