I also conducted experiments with Gorgons. My theory is as follows: The chance of a drop is calculated for each group of ten separately. Roughly speaking, the chance for one Gorgon is 10% (9%), and for ten Gorgons, the chance is 90% (approximately). For the second group of ten, a new calculation is made for a new creature. That is, for 20 Gorgons, the chance will be: 10 Gorgons - 90% chance for one creature 10 Gorgons - 90% chance for a second creature. This is a significant difference compared to 45% for one and 45% for two creatures! In the example with Dirti, the chance is 29.26% for one creature, 29.26% for two, and 29.26% for three. But it seems more correct to me that the chance is 87.8% for each group of ten Gorgons!