I agree. Healers should go for realiable stats like spirit, mana regen, or int. The problem with crits on healing is that they are usually wasted overheals, and they usually don't happen when you need them. On the other hand, steady mana regen through high spirit is something you can plan with and count on. If you go with the reliable, all you have to do is steadily improve your gear with each new challenge and you can win with confidence instead of worrying about random wipes.