Well let me state my case a little different since I am getting beat up on here.
[You must be logged in to view images. Log in or Register.] I meant IF you are the only healer without CII in a fast paced group as a Shaman no way you are going to be able to Slow, Haste, Heal, buff non stop. Haste and Slow are total mana hogs. I didn't mean slow is useless, solo it is golden, but it is not substainable on every mob that comes. No way you can cast Slow till the mob is under 80%. And by then you are probably healing the puller that got beat on and the Tank by then. And maybe the puller is THE tank also witch even makes heals more exciting.
A good puller in a good group is running to get the next mob when the one he just pulled is at say 20%. So it is a constant thing going.
My three highest toons are a Cleric, Druid and Shaman. I KNOW about healing. I have been playing EQ nonstop since 2000. I have a Fungi on my Shaman, but you just cannot keep up Slows pull after pull, and do all the other things needed. You maybe the only person there with root. In a sense a Shaman has too may things it can do. They are a ton of work compared to say a Cleric. You pretty much just keep up with heals and buff every hour.
In a perfect group with a Enchanter, Cleric, Shaman, Warrior, Rogue, Monk well guess what you could Haste everyone and Slow probably every mob.