Frankly, I don't see what the "(Ultimate) Wiktionary redirect problem"
is all about. You want to keep old links working, but not use #REDIRECTs
for bad spelling?
Why not introduce #MISPEELING ? (or a variant ;-)
That would function like a redirect, with the exception that the
destination page will, additonally, say on the very first line
"You looked for the word or phrase WRONSPELLING. We believe you
might mean GOODSPELLING (this page), of which WRONGSPELLING is a
misspelled form."
Am I missing some intricate problem here?
Magnus