Hi Allan,(posted 8831 days ago)After having been tortured by choreographers to shoot the craziest lighting one can possibly imagine, I've learnt some things that might be of use to you.
With the 135mm f/2, you should be able to handhold the lens at 1/30 sec. if you have steady hands; at this speed, you should be able to get good shots if the model doesn't blink at the moment of shutter release. I've had good luck shooting in subways with techpan and 50mm f/1.4. So, you should be okay with 3200 if you are spot metering for the face. If not, you can try to push it to 6400 and use microphen or Ilfotec DDX. With DDX, Ilford time gives me underdevelopment. So, try overdeveloping it for extra 20%.
As for colour, the best film out there is Fuji NHGII. I've rated the film at 6400 without problem. In addition, since the film has a 2 stop lattitude for underexposure, you can try shooting at 6400 and push processing +1 (ie. 1600). I tend to push +3 but that is personal preference.
Above all, please keep in mind that you really need to spot meter for this kind of situation. If your metering is off, the negs will be crazy to print from. I wouldn't shoot slides in this situation if I have a choice. Though, if I have to do it, I would try the Fuji RMS which is quite nice at ISO 1000. Provia 1600 is a good choice too, but just a bit more punchy than the Kodak 1600.
David Hou