Youll never see thier use until you use her and thats the problem with people, they dont use them. Thats ok though, i mean... there are so many classes in this game. Just recognize that people who do use them actualy disagree with the common consensus. I have grace and diina, i often do not need to place a tank to tank something as i straight blow it up and if one is needed, diina and grace are already there. But those are shrine blacks. Shizuka for one is cheaper then them and as Zerozet is saying they are straight out better heavys as long as the heavys skill is not requierd.