We recommend playing with the 4 Action cards only if you have already played a few games of El Grande. You can choose which cards to add, or even play with them all.
Setup:
Shuffle the Action cards as usual. Then, for each card you are adding, return 1 random card from the corresponding stack back to the box.
For example: If you were to add all 4 cards, return 1 random card from stack 1, 2 random cards from stack 2, and 1 random card from stack 4 back to the box.
Then, add the new Action cards to their corresponding stacks. Finally, shuffle each stack again and reveal the top card.