Use Crobat Prime to mess with your opponent's heavy retreat Pokemon and he has resistance to fighting to help against Terrakion and Donphan.
Don't listen to complaints about him being weak to the very popular Lightning type right now, Lightning has Zekrom EX hitting for 150 damage.. that would kill you no matter what type you were using.
Psychic - Espeon. Even if its just on your bench, all your Pokemon will be extremely protected against sleep, burn, poison.. energy removing.
Mewtwo EX. In this format, whoever charges up their Mewtwo EX first wins.
As for fighting, use Terrakion. With just a few fighting energy in the deck, you can send him out any time your Pokemon is knocked out and then put him back on the bench. Put a few Aerodactyl on your bench and now with their Ability your Pokemon are hitting harder then their EX could.
If you want real Fighting type.. Lucario is pretty good, being able to damage your opponent while you have a dead hand and not able to attach energies on yourself.
Conkledurr is hilarious having over 400 HP.