For 10man you are right, it's wasted 90% of the time.
Originally Posted by Kindralas
For 25man you are in turn underestimating the pretty noticeable +33% chance for an earthliving proc per Chain Heal. That's another 1200 or so healing, averaged out over all casts. Much stronger than Earthliving's own glyph actually. Still you are right, people overestimate the glyph and I run fine without it (seeing how I heal both 10 and 25, I never bothered). But the ELW-part is the interesting one, now the straight healing of the fourth bounce. Moar hots!
I'd go by this general rule:
- In any and all setups: Glyph of Earth Shield, it's just that powerful. It's also never wrong, can be utilized while moving, can save someone when the healers are disabled, virtually never overheals and is versatile enough to be used on a Priest Healer at Lanathel25 if the tanks are covered.
- Are you usually assigned to a tank?
Then you need either Glyph of Healing Wave or Glyph of Lesser Healing Wave. Which one is personal preference, I'd advise you to run both for a few raids and see which spell works better as your go-to MT healer spell.
That being said if you're always a tankhealer, consider getting both. Good tankhealing uses both LHW and HW in good proportions, instead of just spamming one spell. If you're serious about tankhealing, both can save a tank's life. The first because you don't have to move out of the fire immediately, the second because it just heals for more.
- Are you usually assigned to the raid?
Then you want to pick 2 out of these 3: Glyph of Chain Heal (25man only!), Glyph of Healing Stream Totem, Glyph of Earthliving Weapon (yeah it's bugfixed!).
In either case, the second glyph (for 25man raidhealing the first one is GoCH, for 10man raidhealing I'd consider GoELW the first one) can be switched to Water Mastery or Mana Tide Totem as necessary for mana. Keep in mind Mana Tide Totem is ~twice as strong as Water Mastery assuming everyone in the group uses the mana.
Also, don't forget to experiment. Ultimately all healing glyphs of the shaman are useful to various degrees depending on your raidsetup. If your 25man always has 3+ Resto Shamans, you could even consider dropping Glyph of Earth Shield which is the one glyph one would normally consider must-have.
The other glyphs are a lot of personal experimentation, I'm currently running HW + ES + ELW. Used to have HST instead of ELW, testing the bugfixed one now. It seems to be somewhere around 100-160 HPS over a fight, more importantly I only lose a minimal amount of possible procs to Earthliving Execute, from parses. I had thought with the autoprocs the glyph would be largely useless but it seems to work ok-ish. But we got a lot of BoW sources so we're always running Healing Stream Totems, so I may just go back to that. ^_^
-- (The Death of Rats, Terry Pratchett, Soul Music)