The effects of the spell were worded wrong in Beta. It now (up until todays changes) "Reduces reuse timers of target by 25%". Also... if you look closer at the spell from beta (as was linked above), then you will see propper wording in the more descriptive text just below the spell name.
Imo, then the spell was situational before.... but now its evenmore so... bordering on useless. The reuse timer reduction of target was imo the REAL benefit of the spell. I mean... if the healers arent capable of keeping the tank alive, then this spell probably wont make much difference.... thats my guess anyway.