Getting 3 Hatterenes set up can make the game so easy, you deal 60 damage on top of the 150 from the attack, and you confuse. Not to mention healing 80 damage for free is pretty crazy. You can even remove some energy or something to add some tools that increase damage, but i think it's probably decent as is. Only problem is decks like Mew that retreat all the time, but still you're just tanking so much damage i dont think it matters too much