^the only thing I can think of for Spock Prime to tell was that Khan has two-dimensional thinking. Not sure what that would be useful for in the case.
I think the answer lies in character insight. For instance, the way Khan thinks, the way he plotted to take over the Enterprise when he was found, his vengeful nature when percieved to have been wronged, and just how he was defeated at the end.
The more you know and understand your adversary, the greater the level of predictability.