@Toma - so are we sorting set order by how common a set is on the ladder or by how effective it is in actual play? Because if its the latter, then CB should be listed first for sure. Not to mention, you basically contradict yourself when you list Mixed Flygon before CB when CB is used more (I think? cba checking).
As for Flygon, I have no problem leaving the Mixed set in, but I would certainly never list it before the CB set. It just does not hit hard enough. CB Fire Punch 2HKOs SpD Skarmory anyway. Speaking of CB, it plays similarly enough to be slashed in with the physical LO set (I did it for its BW UU analyses), so I'd probably do that as well.
I agree with Lizardman on Colbur Azelf's EVs. The current ones are really shitty.