Healing burst is suppose to be an aoe heal that provides wide coverage healing all allies in range. In practice however the spell heals so poorly in the range of 30 to 40% of a healing ray that it's almost never a spell a healer would use to heal a group. On top of the small amount it heals each person it also has a very long cool down which makes spamming it to get more benefits impossible. I sincerely think that the spell either needs a large cool down reduction or a large buff to make it a viable healing skill as we get into more raid and large group content. As it stands no. It just doesn't hold up against any major aoe damage.