Going full WM when you don't want to spend points in multiple prof is usually a bad idea. I'm not a no-WM extremist, but if you got 24 agi, there's pretty much no difference between 5 and 8 WM, even with the heaviest armor you can use so I wouldn't go over 5, and that's only if you really want that speed. After that, IF is a much better investment.
Also, that is what I would do with a 92 speed weapon. If you plan on using faster ones, you can safely decrease WM even further.