u/ExplanationTop5015

There are 509 total cards in card jitsu and 76 of them are power cards (14.93%) so lets say thats the pobability of a card being a power card when u open a booster pack because nobody knows if theres a hidden mechanic about this and it wouldnt really matter

So on average when spending 10k

Two 5k packs

16 x 0.1493 + 2 guaranteed = 4.39 average power cards

One 10k pack

14 x 0.1493 + 2 (guaranteed) = 4.09 average power cards

Now the thing is u dont want just more and more cards, as much power cards in proportion to the total cards u have so again:

Two 5k packs

4.39 ÷ 18 = 24.4% of power cards in your total deck

One 10k pack

4.09 ÷ 16 = 25.6% of power cards in your total deck

And remeber when u play the card jitsu game every card u have has the same chance to appear from the pool so if u only buy the 10k option u gonna have 1.2% more power cards, hope this helps u understand.

Also this is on average. Ofc theres luck and if u just want to have more total cards and spend less its okay, but this is just the reason of the expensive option