This might be getting to you much too late, though I am also posting for future reference for anyone else. I have many years doing low light and night imaging using transparency films, including lots of testing and comparing films.
I have used Kodak E200 (not Elite Chrome 200) for both night club and concert/band photography. The Kodak documents list one stop as ISO 320 to three stops at suggested ISO 800; basically non-linear push characteristic or you can consider push and extra exposure compensation. After shooting a ton of this, I have run it out to 4 2/3 stops push (with exposure compensation).
Kodak Ektachrome P1600 can go easily to be used at ISO 6400, and probably the only film I know of like this in colour transparency. Unfortunately expensive and slightly high grain.
I have also used Kodak Ektachrome 320T at four stops push. The benefit is not filtering (80A,82A,82B) the lens, so easier to use. Grain is noticable, though not bad for some subjects. Compared to E200, I stopped using this film, since E200 goes through a bluer colour shift beyond 3 stops push; in other words a strong blue 80A is too much and a weak blue 82A is quite enough).
One interesting film of the past was Fujichrome MS100/1000, which had great push performance. Unfortunately it was discontinued a few years ago. This I think gave much better results than Provia 400. Now we also have a newer Provia 400X, though I have not tested that yet (it looks promissing).
Kodak Elitechrome 400 is not a very good film, and contrast goes quite higher with any push. This is similar to Ektachrome 400X, which is also grainey. I am less suer how Sensia 400 would perform, though it is a differently cured version of the older Provia 400. In general, I have experienced inconsistant results with consumer transparency films, and I tend to now avoid them for paying gigs.
Anyway, hope your shoot went okay. At least it was for an assignment in school, so if something did not go so well, then you at least had an opportunity to learn something.
Ciao!
Gordon Moat
Dead Link Removed