Full collections will take effort, especially for serialized or limited cards
Assumably, cards with the Vanish ability will synergize with those cards, making it easier for those effects to go off
That being said, you might want to try some of these guidelines: If you enjoy controlling your opponents board and removing your opponents characters from play, the favourite cards are likely to be found in Ruby or Steel If you enjoy getting a lot of ink and resources, your best bet is Amethyst or Sapphire If you hate losing your characters or want to build your game plan around keeping specific characters in play, Amber or Sapphire will help you to do that
This puts a lot of pressure on your opponent to remove Ursula promptly
provide qualifying Top 8 players and the winner with both promo versions
Although Amber does have more healing synergies than Sapphire, so maybe that gives him a little boost