The skill Reviving Blast (499838) is the "power skill" of Champion/Priest with cooldown of 5 minutes and rooting him for 12 seconds. Actual, it causes Reviving Blast (623408) which recovers 60% HP of all party members and deals 50% HP damage to the caster himself.
This is not very useful and would be nice to be more interesting.
Suggestion:
Change Reviving Blast (623408) so that it restores 100% HP of all party members to make this skill more interesting. It would still not be too powerful since it has cooldown of 5 minutes, roots the tank for 12 seconds and deals 50% HP damage to him.
