I've actually been working on a spreadsheet for druid healing mechanics and checking it against the live realms. I should really look at posting that and getting some other numbers from more druids.
Where does Gift of Nature fit in?
...and lo, did 2.0 production FINALLY make Gift of Nature apply after everything. Thanks to Boevis for pointing this out. I've adjusted the math below to address the way Gift of Nature works.
What about my 8/8 Stormrage and Rejuvenation's healing co-efficient?
The rule of thumb is that coefficients are determined by the spell's cast time or duration if you were naked and untalented. Hence why Naturalist doesn't reduce the +healing applied to Healing Touch. In the same vein, 8/8 Stormrage doesn't increase the +healing applied to Rejuvenation. While less of a concern, it also means that 5/8 Stormrage doesn't reduce the already low +healing on the direct heal of Regrowth.
Quickie math:
Total healed by Rejuvenation with Gift of Nature, Improved Rejuv and Empowered Rejuvenation
(RJ+(healing*1.2)*0.8)*1.25
Healing Touch with Gift of Nature and Empowered Healing Touch:
(HT+healing*1.2)*1.1
Some thoughts of my own...
Now, here's something interesting. I've always understood that the +healing applied to Regrowth was divided equally to the HOT and the direct heal (DH). After the split, the casting time bonuses and penalties were applied. The math has always supported this when I've run the numbers. According to
WoWWiki, I've been wrong...but their math doesn't result in my healing numbers...it's slightly off. My numbers, btw, are generated by standing around untalented and then varying my +healing via gear.
For Regrowth, WoWWiki says the +healing coefficient of the HOT is: +healing * [ (21/15) / ( (21/15) + (2/3.5) ) ]. With 822 +healing, this is 265.4 healed/tick. My understanding was that the +healing coefficient was: (+healing/2) * (21/15). This results in 264.2 healed/tick. In game, I get 264-265 healed/tick...so, it's close but I'd side with the number that would round up or down to the numbers generated in game (i.e. my math).
For Lifebloom, WoWWiki's got it spot on with the HOT. Mulitple passes with different +healing amounts results in the expected values. With the DH, the Regrowth math seems to apply: (+healing/2)*(1.5/3.5).
Anyone else run into this or done the math on Lifebloom and Regrowth for something semi-authoritative?