Thanks, Spoony. I've got some basic concepts in mind for all of them (i.e. "this is an idea that exists"), but my work is def way more cut out for me than H-V's sheet ended up being.
Absolutely, since the Nio is an idea adapted from Vajrapani, and Musashi's basically got him as a Stand. Perhaps his multiple arms are a visualization/evolution of Herk's swift attacks via Nine Lives?
In hindsight, a pic of Asura, from Asura's Wrath, would've also been a suitable FC.