Agreed, 10 Minutes is way too long for a single cast spell. This will become a job ability that most of us just forget about, and stop even noticing that it's there because it's recast time is so high. And seriously... using this JA before a cure, you would end up WASTING more time from doing the JA than the cure itself wouldve normally taken.

As far as temper goes, it's even worse than this. 5% DA rate from a self-bufff spell is utterly pointless... and yet the help-text describes this as a similar effect as joyeuse. WOW LOL!.... With only a TENTH of the potency.