Since speculation is being used here, Monkey King Enma becomes Kakashi's ultimate downfall, I doubt he'd be able to predict the movements of Emna since he can manifest his body through his diamond staff form. He would predict the initial movement but can he take on Enma's body parts grabbing and attacking after the intial swing?
The Monkey King also becomes Hiruzen's ultimate defense as well being invincible to all forms of attack aside from Orochimaru's Sword of Kusanagi. Close-Mid Range advantage would go to Hiruzen as well, in terms of attack and defense with minimal chakra consumption, unlike Kakashi who would have to immediately use the Sharingan against him.