#7 - Sept. 21, 2010, midnight
Though I am not a Developer so I could not tell you for certain, Sashar, but given this trinket's level of stamina my guess is that it was intended for melee/tank type characters.
I show no indication that there is a bug associated with the trinket so my best advice is if you wish to see this item be added to Need list for Priests you will want to post in our Suggestion forum.