Where the tank pulls the mob
Tank is group leader. Tank tags mobs. Tag should have branding keys on quick keys so he is able to re-tag quickly. The point where the tank pulls the mob should be considered as the melee group position. If you do not know the instance let the group know. Mortal gold can take over tagging and take point on moving. Bring HP and Mana pots to help out healer in time of need and to keep down time for mana breaks to a minimum.