as a druid i dont see why you wouldnt have a constant rejuv up while running mid anyway, balanced sp/intel/stam is always preffered (by me at least). healers being cc'ed etc can become catastrophic if you have terrible healing abilities and for the minimal mana cost its worth having up imo.
tbh adding some sp and a tad more intel barely gimps your health and unless flawlessly healed by others (which is rare, even in premades) your going to be healing yourself a little anyway.
Devout Aurastone (22 int) all the way baby.