Huge thanks for sharing this tactic. I'm not using it but I used it to evaluate why mine hasn't been giving me the gengenpressing play I want to see. I had set up everything pretty similar to yours but wasn't seeing the pack of wolves mentality. I finally figured it out with the Opposition...
Am I the only one who can't log his Twitter account into the game? I get an account details error each time. I thought I may have been nuts so I went to Twitter, log off and relogged back in with no problems.