Originally Posted by
rheeah
To keep Riptide on 15 targets, you need 25% Haste, and it requires you cast Riptide on EVERY GCD.
If you are casting nothing except your weakest heal (self-nerfed to be even weaker by the glyph), is it surprising that you don't do much healing?
The base heal of Riptide (unglyphed, including direct and HoT) is about 5.04/spellpower/GCD. That's assuming no overheal, of course. Riptide is a high efficiency, low-throughput spell.
If glyphed, this drops to 3.66/spellpower/GCD.
Healing Wave and Healing Surge both have base heal amounts of 5.5/spellpower/cast, with the cast time of HW (another high-efficiency, low-throughput spell) typically reduced to 1.33 GCD's by Tidal Waves. So 4.14/spellpower/GCD. Unglyphed Riptide is better throughput AND slightly better efficiency (HPM) than HW (and provides Tidal Waves), which is why Riptide should normally be used on c/d.
But GLYPHED Riptide is worse throughput and slightly worse efficiency than HW (with Tidal Waves). That is the premium Shaman must pay for a spammable instant-cast heal - the heal sucks. Badly. (Compare to Druids and Priests, whose PRIMARY throughput spells are spammable and instant cast...but I digress). Any time you have the choice between casting a glyphed Riptide or a Tidal-Waved HW, you should choose the HW.
Now compare to Chain Heal buffed with High Tide on a Riptided target (but ignoring any bonus jumps). That lands for 12.2/spellpower/(1.67 GCD), or 7.31/spellpower/GCD; over twice the throughput (HPS) of a glyphed Riptide, but only about 15% less mana-efficient than an unglyphed Riptide!
We can look at this another way; suppose (which I seriously doubt) you somehow manage to have "riptide on 15 targets ticking away". What will be your HPS?
Well, you will be casting 15 glyphed Riptides every 18 seconds, which equals 3.05*spellpower in HPS.
What if I just cast (unglyphed) Riptide+HW+HW every five seconds? My HPS will be 3.2*spellpower - 5% better than the unglyphed Riptide spam. Thus even the most brain-dead, low throughput spell selection still outperforms unglyphed Riptide spam.
The only reason I can see to use the Glyph of Riptide is if you have to move so much that you can't even equal that, or maybe in gimmicky fights like Malkorok or Tortos Heroic where keeping shields topped off at all times is necessary.
Although I don't use it, I think Echo of the Elements (which I guess will soon be nerfed into uselessness by 6.1) is a much better choice for casting more Riptides going without shooting yourself in the foot.
But you should remember, there are high-throughput (Healing Surge, Chain Heal) and low-throughput (HW, Riptide, HR) spells; you should be trying to cast as many high-throughput heals as your mana allows, and using the higher efficiency spells as fillers.