>>4129230
The OOpart you speak of is Kaleidoscope? I tried to dismantle the level 11 rank sword Caliburn, but it became a rank 11 staff Belle diole instead. Unless it's another OOpart.
One thing that's been helpful was when I lose a couple of times against Feuilletine the game told me I could lower the difficulty to gentle, it didn't really feel gentler against that boss but the rest of what I've playing does.