We ran a drill yesterday which was like a game of tag. 2 hand touch gets someone out, but the trick is each person has an arm behind their back. Teams had to work on strategies and communication through the chaos to create 2v1 situations.
It was a lot of fun and felt very similar to the chaos of a melee without the ouchies of an axeman.
My opinion is where the sport is at the moment the best team drills focus less on plays and techniques and on forcing communication. The biggest flaw I see in teams trying to work together is not talking to each other and working at odds. More chatter is the answer and drills should push this aspect