User blog comment:DinoTaur/Compound Hatsu/@comment-1220514-20160504140527

Enhancement, Emission and Transmutation are the foundation of Nen. As you've said, both Manipulation and Conjuration can be seen as adaptations and combinations of these three. Specialisations usually cover more than one category normally, too (example: Pitou's Hastu).

I think a similar argument could be made about Transmutation, which you kinda hint towards in this anyway. All in all, a very interesting read. :)