Board Thread:General Discussion/@comment-33937846-20190723183830/@comment-29354964-20190724134457

Sweet XP is a good place, though the best place to grind it in is Sweet XP (Insane) with a bun bun black.

Refined Palate gives a crap ton of xp as well, though it is rather difficult.

There is also a deadly and merciless stage, though those are extremely hard.