Zmirnøff
Legend
I've a feeling it's simply the mana consumption that resto druids at 85 have to deal with (even though you have SILLY high amounts of spirit by comparison). I'm not so sure about what is more healing, WG/Efflorescence or rejuv, I figure you can check WoL for that (No significant healing changes between 80 and 85, but you do gain a little in terms of regrowth hot healing, and nature's grace (might be an idea to grab this on an 80, since Furor is only a (somewhat useless in this case) regen increase.
Just quickly done a 25 man ICC HC with 85's, and the breakdown of healing was...
Rejuvenation 2815 casts, 12056384 healing
Wild Growth 4835 casts, 7727587 healing
Regrowth 1012 casts, 6700768 healing
Efflorescence 645 casts, 2356118 healing
Living Seed 171 casts, 974200 healing
Lifebloom 351 casts, 964735 healing
Swiftmend 49 casts, 857337 healing
Healing Touch 22 casts, 731387 healing
Tranquility 191 casts, 717667 healing
Rejuvenation as I thought would be my most used spell, I was pretty much putting it on anything that dipped below full hp.
Wild Growth, although wasn't cast on CD. I did use it as much as I could. I might try it with the glyph next time to see if it brings the healing up a bit more.
Regrowth amazed me with the amount of healing it done, I was really not expecting it to be as high as it was. I was spamming it on LK though, 85's take too much fucking damage.
Efflorescence was incidental most of the time, I didn't plan on it's healing as an AoE or anything. Not finding a target in a group etc... It was just extra from using swiftmend as an oh shit button.
Living Seed, incidental from spamming Regrowth so much.
Lifebloom, I know I should keep it up more. But when a raid of 25 people are going down at one time, I rarely think... Oh yeah refresh LB on the tank.
Swiftmend, like I said. Oh shit button.
Healing Touch, mainly just a test of HPS on Dreamwalker and to get some very low health 85's back up.
Tranquility, used this on Dreamwalker and at a phase transition on LK, could have been used more. But I hate CD's.
As for my decision on Nature's Grace, I like my max mana so much. It's an epeen thing. Nothing else.