Sooo what about leveling a second class to 60?

[Allyrion]

There is no armory bonus at 60. Why does everyone keep citing this?

Cause it's in the patch notes. I haven't touched a second job yet but if it's not there, that's probably a bug.

[2.0] The armoury bonus when below level 50 has been increased to a 100% increase in experience points gained.

From level 50 onward, the armoury bonus is a 50% increase in experience points gained.

But you're right. the armory bonus isn't at 60 per se, it's simply on anything lower than your highest level job.