So, my original thoughts were that Xrd changed Faust from previous versions and made his items entirely random, for some reason. So I went into Training Mode vs. Sol, and threw 150 items with 236P. Here are the results.
Common items
Hammer: 30
Bomb: 29
Small Faust: 25
Uncommon items
Doughnut: 16
Chocolate: 12
Poison: 12
Rare items
100 Tonne Weight: 7
Oil: 5
Meteors: 5
Black Hole: 4
Platform: 3
Helium: 2
Pretty obvious pattern, I figure that the items are split into these 3 catagories.