1DX and NFL

I just received my 1DX and will be shooting an NFL game this Thursday night.

I am looking for any suggestions/tips to optimize my hit ratio, etc.

I have experience with NFL with my 1D III and 1D IV, but not the 1DX. Will be using with 300 f2.8 (not II) and 70-200 f2.8 II.

Any input pertaining to settings, etc, from those with experience would be greatly appreciated

1. What case for AF do you use? Do you stick with one or change for different situations?
2. Do you tweak the case you use, or leave at default?

3. What is the highest usable ISO? Shooting for team, not press, quality for programs, and other color print is important

4. Focus points, single, zone, all? keep the same the whole game or change constantly to meet requirements?
5. Any other hints?

I wish I had more time to experiment, but I don't, only 3 days to game time and it is a night game, so any input would be helpful.

Thanks,
Al