The game has just been updated with the new expansion "Phantom Forces" and I'm really interested in the 2 new Theme Decks that came with it.
Deck Lists from Tootsy-san in this Reddit thread.
It turns out there don't seem to be any must-have and they both contain the usual trainer cards. I don't think it is recommended to grind out tokens for them even if for that single Pyroar in "Burning Winds". It is probably better to just trade for Pyroar.