I want to leave all subjectivity out of it.
For example, I would say SEC is slot "1", BIG is slot "2", ACC is slot "3" and BIg XII is "slot 4".
The MWC and AAC would flip a coin. Heads plays slot "3" ACC and tails plays slot "4" Big XII.
Winner of those two games again flip a coin. Heads plays slot "1" SEC and Tails plays slot "2" B1G.