Here is a model of a Super 8 League.
8 Teams play a round robin for 7 weeks.
After the round round the 8 are split into 2 divisions of 4 teams.
The top/bottom 4 teams play a semi finals round robin for 3 weeks.
After the semi finals round round the top 2 team play in the Grand Final.
The Grand Final involves all teams 1 v 2, 3 v 4, 5 v 6, and 7th v 8th.
Please see the attached