Anyone can get into the top 100 just by spending time in ground vehicles, boats and bombers in addition to the traditional fighter/attack modes.
I did that back when I still played actively, nowadays I spend a dozen hours per month or so. I'm hooked again into AAO as they finally managed to root out most of the hacking. But with these hours of AH play it's not possible to split the time between classes or even excell in points.
Basically if you have no life, want to spend a ridiculous hours playing a computer game and invest your life ambitions on online bragging rights, rank is just what you need!
