Just did a church Christmas concert today with my D7200 and Sigma 18-300 and got good results in Shutter priority mode, 1/60 sec and auto ISO with a max of 6400, which I hit most of the time. The noise wasn't too bad. I usually shoot wider than I need and crop in the computer for a little more zoom, I seem to get less noise that way, since the aperture is more wide open the less zoomed I am, allowing more light into the sensor and keeping the ISO a little lower. I tried similar settings on Manual and the Shutter priority worked much better. Good luck.
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.