So after multiple failed attempts, I finally managed to solo the Ragnarok Quetzalcoatl!

[Event 11] Curse of the Sacred Wine Quetzalcoat Raid Event-quetzalcoatl-ragnarok-solo.png

So far in this event I had the opportunity to summon 5 Ragnaroks, reading that others are having problems even getting one makes me question whether I am very lucky or whether they will summon more often the more pp you get per fight (I soloed all my expert raids and started ~30 of them).