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If you simply have Pub A, Pub B and Pub C, and you want to want to make sure the "last one in" wins for each publisher and you are OK with using a Preferred Publisher strategy, then you can just add the expression SourceUpdateDate desc in the Additional Order By field as a tiebreaker instead of using this Custom SemQL Ranking SemQL consolidation strategy. It still requires you to go through step 1-4 but you don't need to configure a Custom Ranking consolidation rule.