[captn3m0]

Brandon Sanderson has a nice video on advice on how he writes characters that are smarter than him: https://www.youtube.com/watch?v=YyaC7NmPsc0 (~5 minutes).

tl;dw: There's different axes of intelligence, and you can setup the situation perfectly to fake the character's intelligence. You can also fake wisdom/intelligence by taking as much time as you need to come up with the smartest/best response to a situation.

Doesn't apply exactly here (He has written Gods, but they are still "mostly" human except for knowing a lot more about their world), but it's good advice.