Such is life.
Also, Sphinx is weaker? I could've sworn I've used Mordred to overwrite it, AND the other way around. But I think Balor was stronger than Mordred... oh well. Sphinx is still a "free" Eidolon to use due to her very high statline. Bringing Mordred into randomland would probably not work out all too well, I need those second heals badly.
Second run was zero problems. Since 2/6 elements are bad to encounter for all non-Light/Dark teams, I suppose I'll encounter one-ish difficult stage this time. I swear to god if I get 2 or 3 tough ones, I'm going to... I'm going to... I'm going to shake my fist angrily at some random direction, because that's totally going to help!