I havent used selective heal yet. Is that how to set up the Germination Rejuv on the tank?
I figured out a really good setup without having to use Healing Touch or Germination (which currently doesnt seem to work) for heroics. Just set Regrowth threshold to like 70 for tank, 50 for dps. Turn off HT and take Moment of Clarity as the lvl 100 talent. Take glyph of Regrowth for the crit. Other glyphs are Rejuv and Wild Growth.
Try get as much haste on your gear as possible. After a day or two of running heroics Im now at 631 ilvl and have haste on nearly everything so its around 13.5% unbuffed. I also have a trinket that gives +1060 Haste on use every 2 mins which I macro with Nature's Vigil and Troll Berserking racial (+15% Haste).
The other trinket Im trying to get is off the second boss of H Skyreach which gives 157 Haste and 157 Spirit which is op for resto.
Its awesome to watch the profile bomb super fast Regrowth crits when hard healing is required and heal up the tank or whole group in a second or two regardless of the damage taken. Also very good for a Tranquility in a desperate situation. The hots tick a LOT faster as well.
8 second window with Berserking up the Haste is at a peak of 43.4% and then drops to 23.7% with trinket still up (lasts 20 sec total). With party and class abilities buffs its even higher of course.
Its especially profitable to pop the macro if/when you get a lucky Omen of Clarity proc, which when talented (lvl 100 talent) gives 5 seconds of uptime rather than one cast. Pop the macro and watch your uber Regrowth spam cost you no mana
Im loving this setup right now and hardly ever wipe unless the group is noob.