Im most inclined to suggest a Voltron playstyle for Kefka, since both halves benefit from combat buffs, but honestly, you can build any deck around him
White White is going to be absolutely rammed with Moogles
If at least one creature in combat has first strike or double strike, you can activate Yuffie's ninjutsu ability during the first-strike combat damage step
This Disney Lorcana Starter Deck can certainly pick up a win against the others but not as easily as those higher on the list
Yuna, Hope of Spira was first released in the set Final Fantasy, illustrated by NINNIN
Cards like Arthur, Wizard's Apprentice and Madam Mim, Fox are perfect for returning cards to your hand, and they're also of the Amethyst ink type