hey there,
maybe for some of u this tool can be usefull.
By inputting monsters per run, time per run, and the drop rate you get how many runs you will statistically run and the time it will statistically take to get your drop.
Only 1/x droprates r working (no 3/8)
https://mega.nz/#!nJYCiYJQ!e6cEzPP2-tBlnAC4Bsrs6dE3lxqu1QChrbD89AwQvd4
tool is made by toliveistodie777