I hate to hijack this thread, but I have some relevant questions:

How do I heal in high-level content? I've gotten used to healing and (trying to, depending on the tank) Cleric Stance-dancing with all three healers fairly well in low level content, where packs are generally pulled no more than 2 at a time (anything more than that and I start foaming at the mouth trying to keep up with the tank). In most high-level dungeons, though, pulls are done usually until each gate from what I've observed. I have enough sense to not to apply regeneration effects until the tank has hate on everything, but what do I do if the tank's health is going below 50% and he's still pulling?

Also, how do I heal in 8-man content? I've never really felt any synergy with the other healer in what little I've done and I've kinda just watched HP bars. But if the other healer is competent enough to keep everyone up, I kinda feel like I'm not doing much of anything. So how do I know when I need to help and when I can DPS?