Continuing on with the mountain, we now have access to both parties! And with that, there's nothing left to do but take down everyone that opposes up! Or Hina will just maul me to death constantly...
Bosses:
Hina Kagiyama: Status-inflicting specialist, mainly in Confusion but can also inflict Blind I believe as well as reduce stats. Not TOO difficult...until she decides to use Bad Fortune constantly and inflict Confusion on everyone...
Sanae Kochiya: No need to heal during this fight, as you'll be fully healed afterwards. Well, no need to revive or use items anyways. The only attack to worry about is Falling Stars really, as it can really mess up the party.
Parsee Mizuhashi: Parsee's a tricky one. She relies on inflicting Confusion on one target, and more importantly, inflicting Silence on the entire party. All while doing pretty decent damage. If possible, it is best to give Meiling the Youkai Ring, if she's in the party, or give it to whoever will be dealing the most damage with skills. Once at 25% or less HP, she'll start using Midnight Anathema, and while powerful, it can only hit one target so just keep at her!
Tenshi Hinanawi: Same as the first fight essentially. Aya + Meiling + Yuuka (if gotten before Underschool) makes this fight a joke. Momiji won't be doing much however...
Superbossses:
Lily White: Lily is the first superboss of the game (not shown in the video I believe, but she's shown later) who will appear the moment you get to use Momiji's team, and will stay there until defeated. Lily is one of the hardest bosses up to this point, hitting a massive 25,000 HP and having various powerful AoE elemental spells, Stop, and Curaga. She is weak to Wind and Shadow though, so having a team consisting of Aya/Reisen/Patchouli/Meiling is feasible. Yuuka, if available, is kinda terrible for this fight as she's just too slow to be able to do anything decent in this fight.