As to my cruicble (Post and Results) I have decided that I will also test three of Coins.
This test will be rather simple. Pop 1 coin, see if an exotic drops. Once I feel I have a good dataset (probably around 100 coins) I will move on to using 2 coins. I am move onto 3~5 coins after if time and strange coins allows.
Results will be posted on the Drop Rate page