Cards I would add to the deck to make it a Stax build are as follows
And if thats not enough, you can cut the pair of Mutavaults for basic land or even Temples, but I have a feeling the mana is finally good enough to support them after all, I did play a Kessig Wolf Run in my G/R list last year
Building at least two or three competitive decks gives you flexibility to counter different matchups in ranked play
Freya, Spirit of Victory X LIGHT Level 1 [ Fairy / Effect ] ATK 100 DEF 100 While you control a Fairy-Type monster other than "Freya, Spirit of Victory", your opponent's monsters cannot target this card for attacks
As somebody who has been collecting the Pokemon TCG since the original Black and White era, despite not actually being too hot on the games, this expansion excites me, and I'm looking forward to seeing what The Pokemon Company reveals for the English-language version