As a deck that focuses on dishing out damage early to dominate the game, your strategy is largely nullified against Ruby/Sapphire which doesnt need much in the way of characters on the board until later
4 Prince John, Phony King Balance Each Other Out A sneaky little version of the Lion king, Prince John, Phony King is a solid character that taxes your opponents for their lore while ever-increasing your own
It will have to do nothing for quite some time before I cut it too
There are also a bunch of transforming cards in case you're worried about the cards getting stale
Make pesky crows fly at your opponents, and all you need to do is play a stream of cards with two or more card types
The other rare in the booster, Weight Set, is hard to reliably trigger on-curve as well, so I wouldnt take it either