right right, Still don't think you need to manipulate the gem drops for the speed run. who are you planning on getting?
In terms of optionals I'm getting
Kasen - Well-rounded in terms of stats and has some early game power that's useful.
Cirno - Has some use with the Slows
Aya - Pretty obvious reason
Wriggle - Her Poison helps with getting past Hina and Iku, and may help even more later on, maybe.
Parsee - Main mind tank who's main use will be for switching, though if I can inflict Terror that's also good.
Nitori - Need I explain?
Reisen - Debuffs as well as her Intense Vertigo Skill (May due some testing to see how many bosses I can proc Death on using this).
Not sure on anyone else though. Kogasa might be a good idea to grab because of Terror and having decent skills, but I'm not entirely sure.