The document discusses generating profiles of web archives to efficiently route requests to memento aggregators. It examines different profiling policies and their costs and precision. Profiles were generated for three archives relating CDX size, URI-Ms, URI-Rs and URI keys. Policies that gained up to 80% routing accuracy with less than 1% relative cost while maintaining 0.9 recall are identified. Future work on language profiles, combination profiles and other uses of archive profiles is also discussed.