Take the base line of putting people in categories:
1. Tank (warrior/paladin/SK)
2. Healer (cleric/shaman/druid)
3. Caster/dps (wizard/mage/enchanter/necro)
4. Melee DPS/utility (monk/rogue/bard/ranger)
It's a good way to separate 4 people into different loot categories and ensure there is less clashing when it comes to finding items you need ^^
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