Under your scenario for the Middle Region, your first premise should read
“if FG and DCA win”
in the scenario “ColA and DCA win”
I think it would be :CA, DCA, NCS , Grace
The 3 way tie for 2nd would go to DCA due to total wins and then NCS would have the head to head over Grace
Let me know if this is wrong
under any final scenario there will be some great games.