What's the etiquette for rolling need on gear that will help you in another role? For example, if I'm tanking an instance and a piece of great +int/mp5 gear drops, am I justified in rolling need 'for my healer gear'? If someone else in the group needs it, I can see passing, but if no one else needs, and it's just going to go be DE'd into a shard, could I need it?