Dragonite EX, Volcanion, Flareon EX, Ho-Oh GX, Turt GX... However the flavour of your Kaiwe deck to me it's bound to have an impact on the upcomming game. Massive even.
I agree with CrowAxe that you dont want to discard all the time but to me the Turt GX will only be a part of a much larger deck that goes of at turn 2 with pumping out 130 damage attacks, sometimes even without downside.
Dragonite EX even allows you to continue the set up, clunks for 130 and removes an energy from the active.Volcanion is the ideal, "don't know what Im going to face" with 100 base damage.
The prime advantage of Flareon EX is that it can move over the fire energies which all set up for a much smoother secondary attacker, it's utility but good utility with say a Volcanion who does not need 4 energies to begin with.
Ho-Oh and Turt GX are the typical follow up GX killers.
Sprinkle in Volcanion EX as your engine and your rolling. It's the deck Ive ordered last week. Once Kaiwe hits and Ho-Oh aswell I don't expect much that can withstand it up until the next comming set.
Cheers,