Talk:Battle Arena/@comment-174.95.203.89-20130605204203/@comment-4830404-20130605212345

Unfortunately, nobody has a cut-and-dry foolproof system that works 100% of the time with even the same dragon and attacks.

This user blog is collecting a lot of comments about what people did against which dragon, though, which you may be able to get some help from:

http://dragon-story.wikia.com/wiki/User_blog:Arezaei/Battle_Arena_Records