I'd set III-8 to 2 . . but would go to 0 IF you are able to consistently keep the selected AF point exactly where you want it. 2 is for when you are likely to occasionally get the selected AF point off your subject for short periods of time.
III-9 set to 0 . . I prefer to be able to select any of the 19 AF points
III-10 set to 0 . . but you need to set it to 1 if you want to register an AF point and be able to get to it quickly with the multi-point controller.
III-11 set to 0 . . but whatever floats your boat is fine here
Of the ones you've mentioned, only III-8 is important to AF acquisition performance.
