We're told that Joshua is 'many times stronger then an ES unit' because it runs on Wilhelm's innate power.
So, that means only Wilhelm and chaos could pilot it. It'd be inert for anyone else.
So...I wonder how strong Joshua really is? If the main party took it on directly, could they win?
A:Yes B:Only if chaos cheats and helps them fight on even terms C:No
Lastly, if Wilhelm in Joshua took on Abel in Omega Universitas...or more acurately, Omega ID...who'd win that one?
In Wilhelm's favor:He's essentially a god, piloting a mech only a god can pilot. In Omega ID's favor:They call it the chariot of the Slayer of God for a very good reason. And Abel's connection to U-DO might trump Wilhelm's Compass of Order.
There is a fine line between genius and insanity. Which side am I on? You decide.