Board Thread:Game Discussions/@comment-24251599-20131204232136/@comment-23870891-20131209074945

Fusion is all about chance. 80% of the time you will get something worse, 10 percent something of equal quality, 9% something better, and 1% something way better (numbers not set in stone, but you get the general idea)

When fusing, you will never get anything worse then 1* lower then the lowest star armor you used, and your best result can be up to 2* higher then your lowest.

Fusing a 2* and a 2*/3* can earn you a 1*/2*/3*/4*

Fusing a 3* and a 3* can earn you a 2*/3*/4*/5*

Fusing a 3* and a 4* can earn you a 2*/3*/4*/5*, but with better odds on the higher stars

Fusing a 4* and a 4* can earn you a 3*/4*/5*

As for how elements work, Fusing together armors can result in any combination of the elements involved but cannot result in an element of the same composition as one of the two armors.

a/b + c/d can yield: a, b, c, d, a/c, a/d, b/c, or b/c

a/b + c/d cannot yield: a/b or c/d