How would you significantly upgrade a CT using binding vows creatively
I would create a binding vow for CSM, where after extracting a CT from a Cursed Spirit during Maximum Uzumaki, instead of having it be a one time use, the user can use that CT freely whenever for as long as they want, but they cannot then summon curse spirits that are of the same grade and above as the Cursed Spirit they extracted the technique from. An example would be Kenjaku freely being able to use idle Transfiguration for however long he likes, but then cannot summon other Special Grade Curses while he keeps the technique extracted, and can only use them again once he relinquishes the technique. A pro of this binding vow would be that the user can still summon lower grade Cursed Spirits. This also applies to if the Technique extracted is from a Grade 1 spirit, but then the user cannot summon a G1 spirit as well as Special Grade Spirits.