Flash is cheap.
That's terrific information, but didn't answer her question really at all, in any capacity. She is asking about AF tracking cases.
And, giving me an ulcer, the OP didn't tell us which camera she has, so who the heck knows which AF case she should use, since we don't know the camera. I'm going to bed.
Hi, I was wondering if anyone could suggest optimal settings for Dance Photography. I will be shooting in ambient/available light,no flash is permitted. There will be "decent" light coming in through large windows, and the construction of the building is off-white marble. I have a Canon 5D Mark III, and available lenses include a 24-105L, 70-200L. Again no flash is permitted.
The OP has given us the camera model, and said Flash is not permitted.
Relax. The OP's amended the original post to add additional information. Those details were lacking in the original post.
I would try experimenting with case 1 or 2, but I find AF point selection may be a bigger factor. AF point expansion works well for subjects isolated in space, but not so well when there are multiple targets spanning the spread. In that case, I tend to fall back to single point. The AF point selection and single point/expansion can all be changed via buttons with the right hand while in shooting position. It will be to your benefit if you are comfortable changing these settings on the fly. Good luck!