Board Thread:General Discussion/@comment-35094757-20180712165518/@comment-35284508-20180712191208

I agree that chests will give you enough of everything. The largest number you can open at once is 10. If you want to experiment with probabilities you could open 1/2 of each type one by one and the rest in large group to compare results. I will probably write a blog post about game probabilities sometime but I can tell you now you don't have enough chests for your results to be significant.

Since it seems you don't use the summons much you can also experiment by doing as much summoning as you can then dispelling them all and report what you get. Or ignore all this... I'm just in an experimental mood and my own current experiment (seeing what sort of offers MT comes up with if I have minimal rubies and purchases) has left me at all time lows in resources.