Well, "minimize" grain is relative, right? I don't think you can have low grain under those situations, but, once you accept that you'll have a lot of grain, there are ways of keeping it under control.
I have had the most luck controlling contrast with Delta 3200. You can get printable midtones without having to go nuts on the highlights. Shadow detail is about as good as you're going to get at 3200 and higher (which isn't much). Grain is kind of popcorn-ish and soft.
I develop Delta 3200 in straight Microphen.
I'm assuming that you're dealing with very contrasy situations. If you're in a low contrast, dimly-lit environment, you'll probably want to push a slower film to give more snap to the image (plus you'll get tighter grain, though probably more of it). I routinely push TXT to 1600 and higher in both Rodinal and Microphen. Highlights are pretty well controlled in both, and shadow detail seems about equivalent, too.
allan