Throwing in your cards willy-nilly doesnt hurt anything, but both players engaged in a trade will find things easier if you have some sorting method
Robinson Crusoe Compatible Card Sleeve Bundle
If you want to breeze through the event and not worry about clearing all the special challenges that restrict the kinds of cards you can use, Marowak ex and Aerodactyl ex are great starting options when building a deck to counter Pawmot
While every deck has its own specific strategies you need to use in order to win, there are a number of cards that can be used in almost every deck that are crucial for victory
For the removed cards, please check the previous update notice
I could list every new card I love - like Alice, Growing Girl, who lends the Support keyword to your other characters and gains four lore when you reach ten strength, or Sisu, Divine Water Dragon, who allows you to draw a new card every time you quest - but in general all of the new cards in Rise of the Floodborn feel like a shift in power and ability