According to This forum(at the very bottom) someone found out that the Chaotic Earring was triggered when the job ability Arcane Circle was active. This leads me to assume that the Haten Earring would be triggered by Warding Circle, and the Priest's to be triggered by Holy Circle. I haven't confirmed these suspicions, however. Don't really want to spend the IS on them if you can only use them for 30 seconds every 10 minutes :/