Theresa falls up the stairs by mobius. This is a potential candidate for replacing I'm Gonna Make You Mine, but needs confirmation from mobius as to whether my solution (replay attached) is a backroute or acceptable. I remember this level being a source of backroute frustration when first posted, but maybe some of these were fixed? At any rate, in the current version it took me a while to solve, and I'm happy enough with the solution to consider it a candidate.
Replay recorded in 0.7.7. Should work in 0.7.8, but the last three skill assignments become unnecessary.