Spark Double is perhaps the best clone in recent years, allowing you to copy any of your creatures or planeswalkers while also removing the Legendary supertype
At the time of writing, the English version of the game has released a super pre-release set of starter decks to get started, with the first booster set and additional decks releasing later in the year
So, instead of painstakingly finding the probabilities for each hand arrangement, you can find the probability of drawing the target card in 6 random cards (for the example with 2 copies, the probabilities are dhyper(0,2,58,6), dhyper(1,2,58,6), and dhyper(2,2,58,6) for 0, 1, and 2 prized respectively)
Every box is inspected and serial-tracked so the information in this guide comes from daily experience in the Japan-to-international Pokemon card supply chain