Both fights are rather easy, no problem auto battling them with my wind team, which is my weakest team at only ~27k with very little assault (no weapons pass skill lv5).
Using Andromeda with Chaos Magic just to be safe since blue uses atk↑ for her overdrive and her raging overdrive is separate from her regular so she can get 2 different atk↑ buffs at once. Red just uses def↑ which isn't a problem.
edit: Switched over to Cassiopeia since Andromeda's revive is just a waste of a slot (unless I want to try Ragnarok solo) and Cass comes with Chaos Magic so I can give her more offensive utility since fight takes longer than I would prefer on auto since my team is so weak.