On Canon I used AI Servo, single spot, that's what worked best and make sure you focus on the fuselage not the engines or wing. Now on Sony I use single spot (small or medium) and AF-C and that's what works best for me, I can tell it exactly where to focus. It might not work as well on older bodies, AF technologies have greatly improved the last few years. Canon I last used the 5D4 and Sony I shoot with A7III and A9.