Many of the best white cards improve cat decks, but you should also include cards like Ajani, Nacatl Pariah, Regal Caracal, Basri, Tomorrow's Champion, and Pride Sovereign
Thankfully, Lucario isn't weak to Miraidon, so if you manage to set yourself up quickly , you can defuse Miraidon's strategy
Even if it doesnt win the game on the spot (which it can enable, unlike Necropotence), it will load up your hand with many of the best cards in your deck immediately, helping form your game plan for the coming turn rotation
A lot of these decks will be playing super equivalent small guys, attacking and blocking will often mean setting your board back to 1 or maybe 0