I think that people should maybe consider that Medi is just a broken character instead of trying to use her as the standard just because of a ~70 magic power difference.
Y'shtola, like Medi, is far and away better than any other unit in her class (MR). But there are a couple of things she can do that Medi cannot do.
Medi is also UR and will take forever to max out.
Suii
Hi! How many Sorceress's Memory I need to fully limit break her main job? Is it possible to get Sorceress's Memory after the event ends?