To the guys talking about 5 man content, raiding is a different animal. To give you an idea, go 5box some of the timeless isle fights like Ghost Ship or the multitude of other ground slamming elites.

You need different tactics for these kinds of encounters because there is so much movement involved. The single easiest way to approach this is to roll all ranged and play from the perspective of the tank (if you have one) or the healer (if you have no tank). This becomes exponentially harder with tank, healer, ranged and melee involved. In fact, I consider it too much of a bother.

My isboxer config became so incredibly bloated with various switches and toggles, heads up icons and what not. Just to handle these fights. Toggles like an as one toggle where all the accounts were stacked and all movement was repeated. Then other toggles to turn off follow and IWT / CTM on the fly. You basically need these sort of things to win. It gets real messy, real fast.

OP: You will want shamans to do your group healing. It actually turns out to be much less clicking involved. 4 * rain drops and chain heal spam with healing tide totems is easy stuff. Though I guess holy priests would do good too. I'd stay away from anything that sucks at spreading heals around though. That is, if you intend to heal as well.