To be a Tree: The Evolution of [Druid] Healing

[Treesh]

That's the quintessential problem with Druid healing - they need spirit regen, especially now that they get spirit/4 regen instead of spirit/5 regen, but the HoT-stack style of healing keeps them in the five-second-rule.

Also, it's cute math, but how often are you going to be using Lifebloom on three separate targets along with Rejuvenation on two? Who heals the main tank, as well?

This is why you have more than one type of healer along on the raids. Don't have the Druids do the FFA healing. Leave that to shaman and their chain heals and the pallies. Keep the druids on the tanks so they can help get some spirit going. Have a priest help out on the tank with their greater heals, flash heals, renews, blah blah. In the 25 mans, you aren't going to have just one healer along. Each healing class has their strengths and weaknesses and all heal differently. It's not "who is the best healing class"; it's "what is the best method for healing in this specific circumstance", but lots of folks don't think that way. There has to be someone who's top dog.