Talk:Battle Arena/@comment-13822330-20140105135559/@comment-4830404-20140105144152

You'll see in the calculator that Champions are pretty bad against Helios (a lv10 Champion has a 10% chance against a lv16, same as a level 1 anything).

Unfortunately, the only things that had more than a 10% chance besides Diamond types is Avatar and Chocolate, both limited dragons so it depends on whether you were lucky enough to get them or not (and fed them to 9 or 10).