Creepers and another mob, the bat should have more lifes or the bat should be able to attack with their dagger. A bat should have night vision so they can see better in the dark, and when its rainy. There should be a special rank that is a charged creeper which deals more damage, but that would be a mob for donators. There should be a charged creeper because then the monsters have a better chance of winning. (If there is a donator on)

Thank you

xSquindoz