Hey, guys.
I didn't realize InsaneDifficulty sank; I haven't been keeping up with the latest.
Anyway, I found a podcast review of the mod. It's pretty unfavorable. The host says he's read the readme and he's made it at least past the FC, so I can't just pin his experience on ignorance. Still, his complaints really focus around counter-attacks, so I think he must have missed part of that lesson about certain abilities triggering counters from certain enemies.
http://classicgamingpodcast.com/episode/82-parappa-the-rapper-final-fantasy-vi-brave-new-world-majoras-mask/
The BNW part starts at 43:40.