I am sure nobody wants to hear it, but the truth to be told, the moment a healer or a tank uses lb (1 - 3 don't matter) the group should be disbanded. If you are in a duty finder and this occurs, make sure you get your butt out of that dungeons as quick as possible. Therefore the looks of LB 1 - 3 for healers is irrelevant since in no cases a healer should have to use the lb.