Board Thread:General Discussion/@comment-36015663-20181018164003/@comment-35175794-20181018202048

The only difference I have seen is the more even a collection is the more even the drop rate is. For example if you need 1 item to fill in a collection and 1 each of the other 4 items you will more than likely get the missing item.

On the other hand if your collections are very uneven say you need 1 item to fill in the missing piece and have 16 of item and 9 of item and 1 of the other 2, in this scenario you are in for a long wait for the last piece of that collection to drop.

The more even your collections the more even the drop rate. Maybe other players can take note and see if this also true for them.