I usually don't use more than 19 trainers. My Pokémon make up the bulk of my decks, mainly because they're the most important part of the game and the decks (it's not called the Trainer TCG ). My energy is usually between 16-17.
^Wrong. Trainers have and will most likely continue to make decks. The difference in mirror matchs is 1) player skills, 2) trainer list, 3) techs, and 4) luck.