There is no reason that you can't set your camera up to do both at the same time. For example I have my camera set up so that if I use back button focusing it uses tracking, if I use just the shutter it uses single point focus and if I use the focus button on my lens it uses a different focusing mode.

Instead of just copying someone else's process try different choices, see what works in what situation and then program your camera to fit how you shoot rather than how someone else does.

With that said the suggestion to check out Steve Perry's focusing information is a good starting point. Perry is certainly familiar with the various focusing choices in both Nikon and Sony cameras.