Once you figure it out, it's too ez. Frag towers, 2 anti air, 2 lasers, max factories, and fill the rest with offensive weapons and simply obliterate the enemy. 2/5
I found the following extremely effective against the unknowns, I beat the boss with 1 army like this.
One row of Samurai
Two rows of Snipers
Two rows of Green Giants
Use the speed to get the Green Giants to the back as fast as possible to kill the unkown's long rangers.
This has happened a few times now.. The game says that it's waiting for opponent and then kicks me off saying I disconnected, even though the chat still works.
 "Snake HD Remix 1.0"){kind=icon}
 "Platform Combat"){kind=icon}
 "Moonrocks"){kind=icon}
 "Game for VERY young people"){kind=icon}
 "Swine Flu"){kind=icon}
 "Swine Flu Zombie Attack!"){kind=icon}
 "Droids"){kind=icon}
 "the green house"){kind=icon}
 "Hero's Arms"){kind=icon}
 "The Great War of Prefectures"){kind=icon}
 "Cell Warfare"){kind=icon}
 "Kongai"){kind=icon}