Star Reef - 1

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 (All attacks focus on the Zombies first, then the Stinky Zombie and the last one, Will-O-Whisp). Repeat this over until you win or either lose.

In Summary
Zombies are not hard, but the Stinky Zombie and the Will-O-Whisp are seriously powerful. Will-O-Whisp can use an ability similar to that of Monty, and Stinky Zombie can spit goo on the birds to poison them.