60 average points from 10 dice = 20 coupons x 10 dice =200

60/7 points = 8 thread per 10 dice

8thread x normal price of thread 38 = 304

so from lucky board 8 thread = 200 coupons

So that is 33% off but lets just say 30% plus the stuff i get from the board. Good deal i guess.

Well i lied, i have 8k coupons. So should i use the coupons till i get to rank 4 BA and then spend on cave or go for rank 5 battle armor and skip cave?