Another Eden - Tsukiha True Manifest (Black Blaze) with Eva Team
3The aura effect makes it pretty clear that the intended way to fight this one is to use Awakened Water Zone + Magic unit, since we get both Magic Crit Rate and Magic Crit Damage
However, there seems to be some sort of glitch where that crit rate bonus doesn't seem to properly apply.... Originally I was trying Eva/Flammelapis AS/Elseal/Levia AS to just start Awakened Water Zone from Elseal only, except Eva wouldn't crit/deal poor damage. So I decided to just forget about that and bring Iphi. Thankfully the bonus is big enough.
Turn 1 Speed: Water Zone then Awaken Zone. Eva must go after all allies.
Turn 2 and 3: Eva just needs to move after the allies.
MP Drain handled by Blood Contract. Can bolster HP (4000+ on each member would handle the 2x 2000 hits/decrease SPD on Eva.
Hismena Alter can be any other Zone Awaken unit with some bonus (or none, if Eva is strong enough).
Eva can be any other water magic dealer like Flammelapis/Lele AS/etc, so long as we can deal enough damage.