Ultimately, it boils down to "do you have this skillset?"
One of the cards I have been considering adding to the deck is Roseanne's Backup since Gardevoir ex and other decks are likely to play Enhanced Hammer again with Lugia VSTAR becoming more popular with the introduction of Regigigas
FURTHER UPGRADES The immediate splashy upgrades are Bitterblossom and Black Market Connections
Each of the five mono-color Go-Shintai are enchantment creatures that have abilities that trigger in your end step
These are exactly the same as the normal booster packs but in a cardboard sleeve, making it easier to hang and display in a store
The Pokemon 25th Anniversary Celebrations Elite Trainer Box includes 10 Celebrations 4-card booster packs, 5 additional booster packs, a special foil Greninja card, 65 card sleeves, 45 energy cards, a players guide, rulebook, dice, condition markers, and a collectors box with dividers