For one thing, the culture of the secondary trading card market is almost as volatile and open to manipulation as the actual stock market, and GameStop is opening itself up a variety of schemes that will be incredibly easy for bad actors to pull off, facilitated by minimum-wage workers who may or may not have any experience or expertise in buying and selling graded cards
Spice Corner Spice Corner Now Im not technically saying you should run the following cards, but there are some spicy options if you feel daring (I wont play them, but Ive seen other people do)
Alesha, Who Laughs at Fate Alesha, Who Laughs at Fate can trigger the raid ability that same turn if you cast it on your second main phase, returning a 1/1 or so
Survival Brace (164/167) Playing against a deck that could potentially Knock Out your Pokemon in one go
Since you wont necessarily know when that opportunity will arise, leaving a large amount of mana available every turn might not be practical