I've never played a shaman before, and am considering giving it a go on Aradune. I've grouped with enough of them that I understand their group role, but what is their place on a raid? Slows and patch heals seems the likely answer, but likely isn't always true. And, with that bit in mind, how many are typically desired in a full raid? Is it a class that's typically closed quickly, in high demand, somewhere between? On a scale of SK to not-boxed Cleric, where do they fall?