I thought Glyph of Divine Storm was a pointless glyph until now.
If you are part of Yogg’s portal group (10), you can heal the group with glyph of Divine Storm and judge light. The damage from the adds are not that high so your heals can compensate for the loss of health. Then when you enter into the brain room, you can heal the group while DPS’ing the brain with no change to your FCFS rotation.
This basically eliminates the need for a healer to enter in the portal.