I guess it depends on your raid composition for where your Innervate goes. My guild is 6/6 SSC, 3/4 TK (no attempts on Kael yet), and we usually have 1 Resto Shaman, 2-3 Priests, 3 Healadins, and 1-2 Resto Druids. Since we also have 2 ferals and 1 balance druid, the priests get their innervates, and the other resto and I get to keep ours. I'm also usually in the MT party, so 3-4 healers are benefitting from my ToL aura. For me, +Healing > Spirit > mp/5. That being said, I enchant for +healing, and I gem straight +18 healing gems unless the piece has a +7 or +9 healing socket bonus.