Talk:Battle Arena/@comment-14448201-20130810035747/@comment-4830404-20130810040242

Keep trying. Use Lotus/Night Elf when they are healed, save your Diamonds for the Diamond opponents later. Remember level does make a difference, so check to see if there are any dragons lower down the list (that you have higher levels of) that give similar percentages...

If you're seriously out of options, check the calculator for your next opponent (Night Elf) and avoid using that. There's a minimum 10% chance of winning, so if you've got too many strong dragons to heal and run out of good options, throw dragons that you won't need at the Lightning and hope for the low chance. Meanwhile, gather up your good ones.

Basically don't let your arena sit unused if you're able to select a dragon.