The buff half the time (more like 90%) seems wasted. I see confession up, I see it fall. I see it up, I feel it fall. I see it up, I get to use it.
Rinse and repeat every 60 seconds.
I would rather PI be changed from a heal to maybe a shield cooldown. We have our lovely main shield, why not add on to it and turn PI in to a party bubble to help eat massive incoming AE damage? Keep the minute cooldown or extend it (I would be fine with it being 2 minutes). Make it require Three lilies. This means it wouldn't be able to be spammed and would have players actually having to pay attention to their lilies more often when they know something big is about to happen.