Here is the current setup on my 5D3, it should also hold true for the 7D2 as well.
General AF Setup:
I use Case 2 but it really does not matter
Tracking Sensitivity -1 works best, -2 can also work but is more prone to get hung up in the background and slow to recover
Accel/Decel Tracking +2 though it makes the camera act a bit nervous is great for tracking fast moving, inconsistent BIF
AF Pt Auto Switching +1 AF follows movement of subject/BIF very well
These are not in concrete, play with the sittings and see what works for you. I have found these work best for me with wildlife and BIF
Lens Drive when AF Impossible: OFF
A lot of photographers like to control light metering and AF separately and config their camera for back-button AF. I do not fall into that group... wait, wait, hear me out. With back-button AF you have now lost a major advantage of our awesome AF system. The ability of the camera to focus on two different focus points using two different buttons. I have my camera set up to focus on the left side of the frame using the AF-ON button and to focus on the right side of the frame using the shutter button. For action this is great, you can switch from side to side quickly. A subject moving from left to right I focus with the AF-ON button and for a subject moving from right to left I focus with the shutter button.Composing a shot becomes mush easier.
Here is how to do it:
1) Go to Custom Controls Menu
2) Select AF-ON
3) Select AF And Metering
4) Press the INFO button
5) Select HP (Home Point)
6) Leave the menu
7) Set the AF area selection mode to Single-Point AF
8) Select one of the left most AF points
9) Hold down the AF point selection button and press the LCD illumination button
10) This point is now registered - if you move the AF point somewhere else it will blink
11) Set the AF area selection mode to Zone AF
12) Select a zone on the right side of the frame (the previously selected home-point will still blink)
That is it, you are done... test it out. Pretty cool, huh?
Another great setting for two button focusing that works well with Zone AF and a backup 61 Point AF for when the BIF get crazy.
1) Switch to AI Servo AF
2) Select 61-point automatic selection AF (you will see the whole AF area outlined and one single AF point for initial focus achievement)
3) Select the AF point in the center of the frame (this is not necessary but practical)
4) Save this point as your home-point by holding down the AF point selection button and pressing the LCD illumination button
5) Switch to Zone AF
Now you can use the shutter button the shoot with Zone AF wherever you want to place it. If the BIF or whatever you are shooting gets crazy or your tracking gets away from you, just hold down the AF-ON button and let the awesome 61-Point AF system, we paid for, do its thing.
And last but not least, a word about Continuous Drive Mode;
The "spray and pray" mode can sometimes be the enemy for good focus. If a subject is coming at or away from you, remember the AF system only works between frames and at high frame rates, that is not very much time to refocus. On stationary or slow moving subject... spray away.
That's all I got... have fun and click, click, click...