Osi AW (which I'm pretty sure will happen due time) doesn't need much more healing. All she needs is more burst gain. Dark is falling behind pretty badly ever since Light got their insane boost in both the dmg and speed department. Dark doesn't lack dmg... but they sure are one hell of a slowpoke when it comes to burst cycles. With these new Rags being released, Dark is gonna need faster burst rotation in order to compete with other elements.