Pikachu exs Circle Circuit attack gets stronger when there are more Pokmon on the Bench, so a good strategy for building a deck around this is to include more Pokmon than usual to make sure you can deal as much damage as possible
The meta became much more about board presence, with Metalfoe and ABC being able to swarm the field through multiple special summons, so thats why Dark Hole got much better, even against Paleozoic i could just use it to force a Toadally Awesome or to clear a board of multiple Paleozoic traps in main phase 2
My advice is to play four in any green deck that cares about poison in the slightest
1/2 Human Rogue with haste and "When this token enters, it deals 1 damage to any target." Enchantment Riders of Rohan When this creature enters, create two 2/2 red Human Knight creature tokens with trample and haste
One of the three cover cards, Mewtwo ex is the best Psychic-type card in the game, and it is phenomenally easy to accelerate energy through the other half of the deck's strategy