User blog comment:B214/Volume 21 info & spoilers/@comment-26285797-20160715154901/@comment-29256333-20160724035928

DXD is finite not infinite ophis give her powers to ise when she was finite. and so even before she weaking ise DXD mode, vali DXL mode is equal to ise DXD mode. both ise and vali are almost equal right now. just because ise beat vali grandpa easily doesn't mean he surpass vali. vali didn't had a form that could defeat rizevim and plus even ise had a close call in volume 21 against apophis and vali had a close call against AZI Dahaka. and these two evil dragons was said to be in the heavenly dragons class making both ise and vali heavenly dragon class.