With teams of 4-5 people, it's impossible to create balanced teams or balanced pairings. By the way, you could launch something like a team league similar to the NBA – based on the results of the previous team competition, captains receive draft numbers depending on their team's placement in the previous tournament. The worse the placement, the better the draft position. It would be beneficial for mid-level players to be captains – it would make organizing the draft easier. The question is whether to appoint permanent captains for the season. Then, you could hold, say, 4 team tournaments in a season and, based on the year's results, calculate the teams' placements.