10, draw lots and divide them into two groups. The double round robin tournament bo 1, with the same record, compares the winning and losing relationship. If there is a team, it will be decided through play-offs. The first two teams qualify, then draw lots and divide into two groups, BO3, and then the last two teams play the final.
The group stage may be accidental, but the team that reaches the final is definitely the strongest. And compared with this, the schedule is shorter and fairer, and there are opportunities for surprises, but not much.