Once you do, getting to double dip on all your removal and countermagic (on your turn) should be enough to close things out
Umbreon (#13, Neo Discovery) Stage: Stage 1 HP: 80 Type: Darkness Weakness: None Resistance: P Attack: [2] Bite (20) Attack: [1DD] Feint Attack - Choose 1 of your opponent's Pokemon
All that's left is identifying the most powerful cards that can alter types -- luckily, there are a handful to choose from
Also you could argue that first edition only made sense early on in the games life, when how rare/special a card is was unclear to new buyers
However, in recent years, the type's playstyle has gravitated towards midrange strategies with powerful early game plays that can stop the opponent from making optimal plays
Authentic booster boxes from a reliable retailer are the best way to ensure you get the exact product you want