Is this worth looking at again? There have been a few printings that have drastically helped it. Once Upon a Time, Force of Vigor, Thassa's Oracle and recently Agadeem, the Undercrypt.
I think you could probably run Force of Will and Misdirection in the right build too.

If this helps, Joe Dyer included All Spells! in his recent Vintage 101.

https://www.mtggoldfish.com/articles/vintage-101-modal-magic