You could probably do with less healers if your healers are good and well geared. My team is split three good healers, three moderate healers. Druids and Shamans are especially great because they can often switch between a heal or dps role for me.
or wow
The only requirement I ask of my raiders is to have an ilevel of 500+.. but I've budged that down once or twice depending on which other dps is coming along.
A large chuck of my dps do about 80k. I've got three of four that do 100k+.
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