Pareto identifier for variants

Currently, as far as I can discern, in order to generate a Pareto (80%) identifier for the Variant IDs in the model, it is necessary to build two tables in an App Builder view - one to return the Case ID and its associated Variant ID, and another with the case count and percentage of total at the Variant level. These tables are then exported and edited to add a cumulative count for the number of cases percentage. They are then imported as Enhancement tables with the appropriate joins - see attached screenshots.

It would be useful to have an inbuilt calculation that enables the user to identify the variants (and by extrapolation, cases) that represent the Pareto of 80% of the most frequently occurring variants.