Interesting. Thank you for that.
I was lucky enough to snag Taria during the other event, so she's my Alpha (she is already superior to Abrael even at three stars) and will be for the foreseeable future, though the costs of increasing affection and levelling are horrific (9 mil to get to the 4th star, and roughly 20k affection XP required. Yikes) for someone like her. Still, I can see my team being something like Taria (A), Abrael (B) and possibly Sherly (O). Current team is that, but Juliette is my Omega (which surprises me, she is quite robust despite being a starting haremette).
I know you should have your absolute strongest as your Alpha, but what's the general rule regarding Beta and Omega? I think Betas are the second best in terms of stats, but I'm unsure about Omegas.
Off topic, but I'd love to get Loving Pelagie. Bit of a romantic at heart, and after watching her storyline, I hope she'll be attainable outside of Epic Pachinko, which I refuse to play.