Regarding the quote about taking resources for the Masked Carnivale and how multiple limited jobs would affect that, maybe all limited jobs could take part in the same content.
Blue Mage, Beastmaster snd Onion Knight could all participate, then its just the job itself that would take the resources.

Beastmaster could have a kind of circus theme like a lion tamer, which would slot in quite well next to the masquerade of the Blue Mage.