User blog comment:B214/Volume 22 spoilers/@comment-73.46.6.122-20161126201153/@comment-82.48.27.196-20161127011927

Well technically resurrecting someone is not healing, same goes for erasing weaknesses. Valerie has been in coma and before she was used by others to use that power, but I doubt she ever really trained in healing, but only about that different kind of abilities who also stressed her mind to the point we know. On the contrary, Asia trained and her healing abilities are incredible, since she also reached balance breaker that can even practically vanify Rizevim's attacks. I would say that Asia power is focused into 1 single factor, while Valerie has many and control a Longinus is much more difficult than a Sacred Gear not unique like Twilight Healing. Valerie simply has to train, her potential is absolutely not inferior to Asia's.