User blog comment:Arezaei/Battle Arena Records/@comment-6872315-20130627023952/@comment-10317322-20130627043541

As others have recommended, use the 'Battle Calculator' on this Wiki and try to use the dragon you have that's closest to the top. Unfortunately, all that does is improve your chance of winning. The formula for victory now has a huge luck factor built in which severely lowers your chances of winning... Getting the 'critical' hit is more important than which dragon or even which attack you try. Additionally, getting that critical hit can happen on the 1st, 2nd, or 3rd attack with equal probability... Hope this helps!