Bamboo Forest - 5

Strategy
Choose Matilda in Druid, Bomb in Cannoneer and The Blues in Rogues. Heal with Matilda if the birds' healths are not full and if they're full, attack with her. Then attack with the others (focus on Ninja Bowmans first, then the Mandarin and the last pig, Will-O-Whisp). Use the Rage Chili on The Blues when it is full. Repeat this over until you win or either lose.

In Summary
Will-O-Whisp can make the birds miss their attack, and Mandarin can lower attack power.