Do you guys want a tip? u get 5-7 sarduakar elite and take them to the enemy spice field and aim for the carryalls. When they pick up the harvesters shoot the carryalls in the air and it takes them out. hahaha!!!
The only good thing about the guild mega cannon is selling it, because it takes too much power & it hardly does any damage- -and it takes way too much time to fire also.