Any suggestions on who I should prioritize building next? I was thinking Rilmocha, Kloss, or Hoyan for easier DokiDoki clears, but I'm not sure which of the three would be most valuable over all

I want to build Holden but I built my Lian for the Hyperlink Charter so he seems kind of redundant atm.

Also still not sure the priority order for building a character in general. Is it levels > flat stats from prowess > shell > modules? Pls advise