Schumann's "Viennese Carnival"

[gracehaven]

My goal is to teach a transfer student (who has excellent rhythm, note reading, & sight reading skills and comes to me with 5 years of solid piano study) Robert Schumann's Viennese Carnival (Mvt I).  This student adores Schumann and this piece. 

My student already plays about 10 Bach 2-part Inventions and he's in the level 5/6 of Frances Clark's Piano Literature books - 17th, 18th, 19th Centuries; Contemporary; etc. just to name a few of the books he plays from.

Could you please list some pieces, in order of difficulty, that would take my new transfer student from where he is now to his desired Schumann piece? 

TIA