In fact, the situation at that time was not much different from what Zhou Tian had anticipated, and it was a good thing he hadn't taken any actions yet. However, as soon as he initiated his action, he immediately caused considerable destruction to the Human Emperor Camp.
Zhou Tian, though weakening his own strength, had his reasons for sending those cloned Beastmen out. Although the cloned Beastmen couldn't be away from Zhou Tian, their master, for long, it wasn't a problem for Zhou Tian to send them away for a while. During that time, even though they were away from Zhou Tian, they still had the ability to exert their strength outside.
One could imagine that when Zhou Tian's Beastman army was in a deadlock with the Human Emperor's allied army on the battlefield. The situation on the battlefield would change dramatically when Zhou Tian's cloned Beastmen suddenly broke through and attacked.