Just a small point ... don't ever 'export' a character from Poser. Use the base obj from the Geometries folder.

Props are good for things like sandals, thongs, any kind of shoe that doesn't require an ankle bend. Once you move further up the leg though, you're going to have to switch to conforming.

Archdruid, if the shoe is a conformer, the toe should bend seperately from the foot so no morphs are required.