Since InfraWorks 360 is using Navisworks as the background engine to convert the Revit model as .NWC before importing to InfraWorks 360 (besides the cloud option). It would be nice to have .NWC as one of the support data source formats.
I use Navisworks to generate a "federated model" with multiple Revit linked models. Then, I export the model out from Navisworks as .FBX format for InfraWorks 360. Unforturnately, the file size increased a lot in FBX and end up not acceptable in InfraWorks.