I always assumed that the idea of the sch was to have a healer that could heal multiple targets at once, similar to how a shaman works in WoW with its chain heals. You cant do this unless you leave the fairy alone but because the fairy is so stupid and the range is broken it spends more time moving around to try to heal some one who is at "low" hp that by the time it starts to cast the spell they are probably at max HP making it useless.