By exposing yourself to different strategies, you'll be better prepared to face various opponents and adapt your tactics accordingly
Interestingly, this set was designed as a throwback setdespite being a third-generation set, it was centered around Pokmon from Gen 2 as well as selected Gen 1 mons, which had evolutionary links to some from the second generation
Use an X Speed Item card or Leaf Supporter card (I recommend X Speed if youre already taking Sabrina and Giovanni Supporter cards) to retreat Manaphy and put one of your ex Pokemon into the Active Spot, and you can then use Vaporeon to move around
The teacher videos do not have sound on my mobile device
Supreme King Z-ARC: This is a more difficult card to discuss, as while its easy to place Z-ARC into a deck, its more difficult to talk about the strategies that go about utilizing Z-ARC
The answer might be more complicated than you think