For some reason quite a lot of high level to bis shamans are using Glyph of Healing Stream Totem. If you do some research on this, you hardly find anything. From what I could find, it is only mentined on elitistjerks with an interesting explantion: On the Valithria Dreamwalker fight, the totem gains from healing stacks, so it can heal for up to 5k per tick. The glyph is used to maximize this effect. Is this the reason?

My explanation would be this: If you check the logs, healing totem - discounting overhealing - performs surprisingly well, so it makes sense to buff it by 20%.

Anyways, does someone have a definite answer for using this glyph, other than taking a more or less educated guess?