Here is the 3 team tie breaker rules straight from secsports.com:
Three-Team Tie (or more): When three or more teams are tied for a finish, the following procedure will be used (in descending order until the tie is broken): Once the tie has been reduced to two teams, the two-team tiebreaker procedure as stated in No. 1 above will be used.
A. If all three teams are common opponents: Total won-lost percentage of games played among the tied teams.
B. Won-lost percentage of the tied teams versus the No. 1 seed and proceeding through the No. 8 seed, if necessary, using common opponents only.
C. If three or more teams still are tied, the Commissioner will conduct a draw.
From this, assuming LSU finishes last, we would be 3rd, OM 4th, and Auburn 5th due to Section A of the three team tie breaker rules.</p>