The Debussy toccata is roughly aroudn the level of the Ravel Toccata (although some would disagree

) - it really depends on the pianist.
Anyway, 23-4, 23-6, 23-10, 32-5, 32-12, 32-9, 32-10 (possibly... there's a tough cadenza).
Try some etudes too! 33-3 and 33-7 are great, and not too demanding.
Good luck!

- M