Oh yeah I think I know the one you're talking about. That one gave me some trouble too but not to the point where I had to grind. But yeah, I dunno. Might've been a lot of things then. Lack of good comboing, just weird gear setups like having a physical attack based Raynie, using a party that isn't ideal for slightly lower than normal levels, or just a lot of things.
I'm just saying unless you're intentionally going out of your way to go low level you probably shouldn't need to grind in the game ever.
Except for the optional boss. That guy is a pain. I didn't bother with him.
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No problem!
This is a cute and pop genocide of love!