Been running a custom Touhou D&D campaign with my friends and right now they're gonna do some battles to help me gauge how tough they are in the story. I have been using a site to help with abilities and attacks, but it's incomplete and I was wondering if I could get some help/suggestions on making their opponents. Been working with https://sites.google.com/site/skardaestouhoudnd/home
Easy: A human in a wooden mech (gag character they made)
Normal: Mokou and Keine
Hard: Eiki, Komachi, and 3 spirits
Lunatic: Marisa

I think Marisa and Mokou are good, but have a blank on how to do the other 3. Any suggestions or tips?