MV attribute set using advanced import flow rule from multiple simultaneous MAs?

I'm trying to set an MV attribute, displayName, using advanced import flows based on multiple MAs.  I understand that I can simply use precedence on the MAs to define the MV attibute but one value that's being used in the computation, obfuscatedPerson, is only available from one of the MAs so that approach will not work.

I can use an advanced export flow rule to take the obfuscatedPerson attribute into account but then I end up with a metaverse view that doesn't correctly represent what's being populated in the connector spaces.

Is there any way to get this to work with an import flow rule?

Cheers,

      Ian Thomas