As for what you should replace for Kida I would look to remove Starkey and Cubby as neither of those cards are going to be super helpful for you once youve made all of these other upgrades to your deck
For example, say a Bear creature enters the battlefield and, later in the turn, gains the Frog creature type
Maybe theres a future legendary creature that buffs drakes and dragons equally
But what about some of the cards it could combine with, in Limited
For example, if you gained 2 life and lost 1 life in the same turn, you still lost life
As this is a 30-pack Play Booster Display Box, youre getting a full box for Limited games, deck-building, or simply cracking packs with a little Final Fantasy nostalgia in the background