I think the heal drops are a waste of time and only meant to encourage people to spend more UN to get energy to heal. It robs a person of those small energy boosts to help them with their heals. If you are going to give a drop that heals the Raid Party then at least give credit to the person getting the drop. Have it count towards their total number of heals. This is not a feature that improves the Raid Boss in any way.