Whats the most effective strategy for dominating team challenges in Zwift, and should Zwift implement stricter regulations to prevent sandbagging in events where riders can choose their own categories? Is it fair to allow riders to choose their own categories, and do you think this leads to an uneven playing field? Should Zwift prioritize team work and strategy over individual rider performance, and how can this be achieved? Should there be separate events for teams with riders of varying skill levels, or would this dilute the competitive nature of the challenges? What are the implications of Zwifts current system on the overall competitiveness and enjoyment of team challenges, and is there a better way to structure these events to promote teamwork and sportsmanship?