Hmmm .. guess I was surprised at this since I know you're using 35mm film camera. Lower speed film will give you the same benefits in sharpness and such as any other subjects, but not necessarily needed for models. Since you/re on a tripod anyway, low is good. I haven't shot film in almost 20 years so can't comment on any specific film.
I have a Tamron 90mm closeup lens I use for models that goes down to f32 and dept-of-field is a non-problem for me now.
I did just trade up from my Nikon D80 to a D5100 body with a 16.2 MP sensor and the tail fins on a '59 Chevy almost cut my LCD screen with sharpness!!! Truthfully though, I cut everything down to 800x600 for posting so its all overdone.
As has been said, shutter speed doesn't matter much either. You WIILL be on a tripod doing a model.. that's an order! Outside you might use something as a reflector on the shaded sides just to even out the light and contrast. I've used white cardboard boxes even.