So I guess I don't really have enough Athena friends to really farm alt dungeons for all they're worth. If anyone on MOTK often has an Athena that they use often and isn't my friend yet, please consider sending me a request.
I had to try some other things to make up for it, and they worked. I used TamadraPurin and green/black Meimei and didn't have any significant problems, although Meimei feels just a little risky, especially since she reduces my light damage significantly. What else works for this?
Amaterasu could work. She only buffs half of my team and I'm not sure how big of a deal that is. Her leader skill could let me arrange my board in situations where I wouldn't otherwise be able to, and her active is situationally useful.
Girl Thor is similar to Amaterasu, but gives more HP and way less recovery. Lack of two-prongs is worrying.
Zeus Olympios seems like a solid choice. He's a little risky and his active is almost certainly useless unless I see multiple masks, but his damage is huge.