FCCS_Total Equity at parent value

We have three entities that roll up to the same parent. Total Equity for that parent should only equal the equity of one of the base level entities. However - it should also equal the CTA applicable to all three base level entities. Example below.

Has anyone else had this presentation requirement? If so, how did you do that? We tried to update our owners equity rule, but it doesn't seem like it can do both requirements (1. Eliminating all equity accounts except for CTA for entities 1 &2)