I thought Shart being the designated healer with a lot of light spells odd too, damage absorption instead of healing would make more sense in her case. The argument that spells don't have alignments makes more sense when you approach it from a neutral stand point than from a clerical one. You can have a conversation with Gale on this subject in regards to Sharan shadow magic - and when you play his origin and put his theory to the test, you'll find out that many of the other companions disagree with his opinion.
