You're assuming that SSR Cybele won't be available with the next Miracle ticket. Given how Nutaku handled this Miracle ticket, there's a distinct possibility that she'll be available with the 2nd. In any case, it's a calculated risk to not take the straightest path to the build you're after.
In my Wind team, I use Mordred (Sniper Shot), Gaia, Cybele, Oberon, Sol. It works well enough for the Rank 4 Thunder Accessory Quest at least. Subbing any SSR for Cybele would be an improvement there. Not sure if I'd want to replace Sol with Titania though, as the team would lose a lot of survivability.