Depending on how the meta evolves after rotation, Team Rocket cards could become even more valuable
As far as strategy goes I would recommend using a card that allows you to move one energy card from one Pokemon to another that way I could use Reflect Energy every turn and at the same time attach an energy card to another Pokemon in the same turn
Goblin Grenade (No, Seriously, An Honorable Mention) If you havent been playing Magic for a long time, you might laugh at this card a bit
Lunala 150 Kiawe Supporter Choose 1 of your Alolan Marowak or Turtonator
These Pokemon are the core of every good deck, but pulling them is really difficult, and potentially really expensive
Monster Manual is trying to end the game in short order and the gameplay isnt especially good, so I would generally only recommend it for high-powered Cubes, but its good enough to hang in those environments