Wicked 12: Save 97% (78/80)
Don't know why I didn't try this sooner. Anyhow, new record:
Wicked 12: save 98% (79/80)
Believe it or not, this is a glitch-free solution.
It can be a little tricky to get it to work though, even after you have the right idea. Besides some precision that's necessary, it seems that you have to do things in a very very specific way for this to work out the way you want. Or maybe it's just coincidence that I could only get it to work out when doing it that certain way.
Anyway, anyone who thinks they have the right idea but couldn't seem to get the game to just cooperate, e-mail or PM me and I'll give you a tip that might help. However, what qualifies as a "right idea" involves sending a screenshot of places where you need to be pixel-precise (truly at-that-spot-pixel-precise, as opposed to off-by-1-pixel-okay), not just explaining the idea in general. Sorry for being vague, basically when I determine that you got to a certain point regarding this level I will give you the tip, which incidentally might or might not really help, since I don't really understand why it would make a difference in the first place.
Anyhow. So let's see, I think the ultimate challenge for ONML has gotten down to 85 lost total, correct?