OK it would seem that if you want to shoot indoors at night that even in the days when film was a lot more popular your best bet was to push 320T, I don't quite understand why there wasn't a demand for fast colour negative tungsten balanced film, anyway there's a few options I'm leaning to. Shooting with Portra 800 and just correcting late. Shooting Portra 800 with an 82b and also correcting in post as a compromise. Shooting with Fuji 1600 or maybe even 400x pushed two stops and an 80b still even with such a fast film I'm left with the equivalent of 500 or 640 and my 50mm lens is only a 1.8 (I do need a 1.4.). I'm not sure if I can think of anything else, what would be the best option?