You do not say whether you intend to or want to use flash. Flash could provide a high effective shutter speed and freeze any motion. For situations in which adequate working distance is needed I have tried many combinations. I have had good luck using the Canon 200/4 FD SSC with extension. The 200/4 AI/AIS Nikkor is also a decent performer with extension. For Konica I have the Vivitar Series 1 90-180/4.5 Flat Field zoom. It goes to 1:2 at 180 and to 1:1 with a 2x teleconverter. The original Konica Hexanon 2X worked well with this lens. The 200/3 Vivitar Series 1 is a lens I have in Konica and M42 mounts. It goes to 4 feet by itself and I have used it with extension. Unfortunately the Vivitar 2x Macro Focusing Teleconverter was never made in Konica mount but the Panagor Auto Macro Converter with a lens in the 100-135 range can give increased workng distance and good performance if you stop down adequately. Another possibility is an enlarging lens in the 200mm range, with extension. One of my favorite longer lenses for close-up work is the 135/2.8 Vivitar Close Focusing. It goes to 1:2 by itself and the design is fairly simple. It has unit focusing and a long helicoid. This gives good working distance. I do not remember exactly how the Canon 200/4 FD Macro compares to the 200/4 manual focus Nikkor Macro. From what I do remember it also "zooms" internally and is not really at 200mm at the closest setting. Another possibility is lens stacking. You can mount a 100 on your camera and then attach the front of that lens to the front of a 50mm lens with a purchased or improvised adapter.

The reasons I think the f/9 lens may not be practical is that it will need extension, it has no auto diaphragm and it will be difficult to focus even if it is used wide open. You might use one of the small LED arrays for a modeling light if you can keep several sets of NiMh batteries charged to give you enough time. It is easy to underestimate the difficulty of focusing through a very slow lens when you have a moving (even slightly) subject. I have had the complete Minolta Auto bellows III set-up for many years. The 100/4 bellows lens (2nd version) has the same formula as the 100/4 MD Macro but I never used the bellows lens to chase things around. Unless the light is very good I don't enjoy using the 100/4 hand held even with an X-700 with a grid or plain matter screen. The 90/2.8 Panagor or 90/2.5 Rokonar (Elicar, Spiratone etc.) or Tamron 90/2.5 (52BB) are just easier to focus because of the extra speed. It will be interesting to hear what you finally do. The F3 and F100 can give you TTL flash metering even with bellows or process lenses but the lack of an auto diaphragm is difficult to overcome with a moving subject.