Which statistical tests are you going to use? What degree of bias are you trying to exclude? What p value are you happy with? How many rolls does that require?
I will runt it 500 times ( 50 per day since i am not in a worry) and see if theres a bias.I accept a bias of 30% for one side since it still has good entropy if i go for 24 word seed. Even though i know it cant have that bias since they are casino dice
this method is from iancoleman website. Do you think its not good enough since he is the creator of the bip39? why do you think the coin flip method is better?