User blog comment:B214/Volume 22 spoilers/@comment-30924344-20170128052407/@comment-30924344-20170128165041

Issei's team is impressive though. You have Asia who can negate the damage of super devil level attacks so she can negate even Sizechs' base form attacks and that is powerful. She also can greatly heal allies in a wide area, probably the size of a small town or just behind. She has an almost impentrable defensive healing power.

Ravel herself has pyrokinesis and its been confirmed she's the strongest of her family for the fact that yes, Ruval is currently the strongest sibling but Lady Phenex said Ravel has this hidden potential and that always means they have a power that far exceeds their family. I theorise that because her family has healing properties from their tears, then her hidden potential is similar to asia's irregular balance breaker, but instead defensive healing, its offensive healing. Anyone who enters her healing area who is not deemed an ally will get their life force drained away and also her pyrokinesis is greatly powered up.

Xenovia wields the second strongest holy swords, Durandal and Excalibur [they are equal in power] and she is a very strong woman. I think she fuse the two swords together to make an irregular holy sword like Yuuto has an irregular demonic sword, it would fit perfectly.

Rossweisse is naturally the strongest woman on his team [I said naturally not that she is the strongest woman] because she is a half-god and has proven her genius intellect and magical capabilities that can rival even Loki's.

Elmenhilde will be just as powerful. Bova and Bina too.