Index and Match with based on IF then condition?

I am unsure how best to explain my problem, so I included an attachment with example data and my desired output, along with my first attempt.

I am trying to create summary tabs based on columns and rows in another worksheet. This is an example- in practice the "Rev" document in the attached is a complex pivot table based on inputs from company stakeholders. My desired output and my attempt (using Index and Match functions) is attached.

I need a solution that only includes Briefs if Rev>0 in the 'In Brief' column, instead of returning all the Briefs. Do I need to incorporate and Offset function?

I appreciate your input.