Maybe , the other clan make 2 teams, and we make 2 teams , we play against each other.
Or , we make 4 teams , 2 from each clan , but independent. Its like free for all you know. Team 1 plays vs team 2 and team 3 play vs team 4
If team 1 wins and them 4 wins (for example) team 1 play vs team 4.