I think Diaz takes it with his striking. I feel that Nate wasnt at the level he is now when they faught, and now Nate is near enough at Nick's level or above. I think Nick would be able to put Rory on the back foot and Rory would be predictable and desperate with his takedowns. Diaz would eventually start hammering into him on the cage in the second round and would have a HUGE win, although it's a massive risk for ANYONE to fight Rory.
I'm probably the best at keeping threads on topic of all time.