Significator cards are not limited to those shown here, but these are the main cards that we use to create a theme for our readings. As long as your intention is clear before you begin and you receive accurate results then feel free to experiment with others.
One important thing to note is that if you use a certain card as a significator then you’re taking it out of play, meaning that it cannot appear in the reading. If the card is one that we would look for as an outcome it’s best to leave it in the deck and choose a different theme card.
For instance, if you wanted to know about love it may be better to leave Kissed in the deck and use the card to signify you instead (Hero or Heroine), as Kissed may be one of the cards you’d look for in the reading. You’ll also find an example and more information on this technique on page 148 - 151 of The Chronicles of Destiny guidebook.