i call bull. no way are you getting 35 charms packs for 2k coupons, you would need to get an average of 12 points per dice. even if you spent 3k coupons it would be an average of 8 points a dice for 35 charms packs, which both of those numbers are above the average and the first is impossible to maintain once you do more than 5 spins. without perfect luck your not landing on that many 10 point tiles in a row to get 8 points per roll after 100 rolls.

the average amount of points per roll is about 6. 50 charms packs from redeem of lucky board cost 1750 points/6 points average is 291 rolls. each roll costs 20 coupons for a total cost of 5820 coupons. even if you say the average is 7 points that's 5k coupons for the 50 packs, and the higher your average the less items you land on.

@op - depending on your luck and what you want should determine what you try and get, figure out how many things on the lucky board are worthless to you and if that number is too high then just buy the packs, because i wouldn't recommend spending coupons to get magatama, hirashin kunai, stam pots, ect from luckyboard