At the beginning of a project, we use EPIC prioritization before the EPICs are broken into stories to direct the design teams to the highest priority work in a project. Even as the project gets underway, we would like to use EPICs rather than stories further down in the backlog to prioritize work. However, the current method of changing the rank on an EPIC by drag and drop in filter panel of the scrum board is very cumbersome, once you have more than 10 or 15 EPICs.
The shortcuts for changing rank on other issues don't seem to work on the EPICs in the filter pane.