I understand that this glyph is pretty standard but the math on it doesn't make sense to me. The glyph adds a target and increases it's cooldown buy 2 seconds. It normally having 5 targets adding a 6th is a 20% increase in its healing right? But that 2 second CD increase makes it a 10 second CD, up from 8 seconds making that a 25% increase in CD and therefore making it usable 25% less in a fight. Am I wrong to assume that would work out to be a net 5% loss in healing from the spell?