I've been able to make some changes in a reasonable time frame.
To get a stronger effect and more interaction from the arrangement the realms ambassadors and diplomats could pair off and tour together. They can combine their skills to spread peace and while they're at it discuss which realm has been giving them funny looks.
True, if both realms have ambassadors that are good sport. I kind of get the feeling though that, being anonymous, the defeated realm would just do the opposite work without saying so. "Gee, those peasants sure are stubborn, aren't they?"
