This Demon Lord battle's not looking too good. There's no secret or high IQ test with this one is there? Just use the sword to remove his barrier, equip your best gear, and spam combo-ed dragon dive and basic attack? I'm worried I wont win within the time limit. I need to average at least 250M damage per turn, but it seems I'm below that (around 100M - 150M with just Fumika), though this is without the master swordsmen crest.
Also, is the despair debuff removed randomly? Maybe an ally removes it? Or is their a requirement? In one run I saw it was removed quickly. In my most recent test run, I didn't see it get removed.