One of the big misconceptions about the Scholar is that they are a shield healer and I think that comes from the fact that they were originally the only thing you could choose from aside from White Mage and when you put them together the most notable feature they had was providing the shield White Mages couldnt. When you look at their ability kit though and how they progress and grow as they level it becomes obvious that they are a trick healer. Almost every heal a Scholar uses doesn't require MP. In early Dungeons Scholars can rely completely on their fairy and in End Game dungeons free instant cast abilities become your best friend. I think we have yet to see a true Barrier Class Healer. A Healer that specializes solely in mitigation would be very interesting to see because so far we have a lot of reactionary Healers that just happen to use a barrier.