Utilizing flicker spells like Essence Flux and Ghostly Flicker will be the best ways to protect Kefka, at least until you flip him
You dont even need other chocobos, since Choco, Seeker of Paradise just draws you a card whenever you attack with it, but additional birds really make it that much better
Standouts like Lrien Revealed and Oliphaunt cost just 1 mana to cycle, which makes them incredibly strong in formats like Pauper where efficiency really matters
10 Competitive Disney Lorcana Cards Under $10 for the New Core Constructed Format *Disney Lorcana Attack of the Vine
Heck even Innistrad Remastered, a recent premium set, was cheaper, with boxes going for $162 and $325
I also am running Oran-Rief, the Vastwood which will love the Bastion