1) Communicate
This comes first because you need permission for everything these days.
2) Navigate
This comes second because it directly links into 1 and probably includes a moving map integrated with the radio.
3) Aviate
This comes last because everybody knows how stable aircraft are designed to be these days and you've probably got an auto-pilot. Also no need to look outside because the transponder is on making you feel nice and safe and guess what? It's probably integrated with the moving map and radio!
I jest of course
