So while the Equipment deck is fairly well-supported, the "Power 7+ Matters" theme is mostly relevant only because of our commanders, Cloud, Ex-SOLDIER and Tifa, Martial Artist, which reward you for boosting their power to 7 and have a starting power of 4 which is high enough to quickly reach the goal with a single Hero's Blade for example
Magnified Treatment Associated Sets: Speaking of Things-in-Rings (patent pending), lets zoom in on the Magnified treatment from Karlov Manor
The Tarmogoyf on the top is the fake
With both Gengar and Mimikyu in the picture , it's no wonder that the secret rare team-up from Sun & Moon has accrued quite a bit of value
Grimer only hits for 10 when he attacks your opponent , but that is not all he does
Maybe you remove swingier cards, or add more rares and mythics to have a more powerful game