You simply make agreement with someone to make a team. Then you two decide what your team will be called and in the end simply sign in your team with team name and put name of players in brackets, just like I did in last post.
Being in team just means your team gets score based on your ranking in each category. In general, first place in category brought 10 points, second place 9 points, third place 8 points and so on. Best placed teammate in each category is assigned points for his achievement. Rules for this case could have small addition: best score according to category final ranking is assigned for each teammate, even if they are in same category.
Example:
I end up second in Areas category, and fifth in Pindle. My teammate Max ends up first in Pindle. Total points of team would be: I'm getting 9 points for second place at Areas, and 0 points for Pindle since my Areas ranking is higher. Max is getting 10 points for Pindle ranking. Final team score: 19 points.
Example 2:
Nagisa and OMG are unbeatable team. Nagisa ends up first in Areas category and first at Pindle category. OMG ends up second in Areas category despite finding two Tyrael's, and second place on Pindle. Points are: Nagi is getting 10 points for either Pindle or Areas (can't get for both), and OMG is getting 9 points for either Pindle or Areas. Final team score: 19 points.
Now there could be different points value assigned depending on ranking. Or even score. Whatever works. It is up to Nulio to make scoring system.