“The Metrics Toolkit provides evidence-based information about research metrics across disciplines, including how each metric is calculated, where you can find it, and how each should (and should not) be applied. You’ll also find examples of how to use metrics in grant applications, CVs, and promotion dossiers.” — from the Metrics Toolkit About Page
The Toolkit provides an app to help scholars determine what metrics are most important to specific discipline/s. The examples cited in Case Studies, are from the sciences, but I think the Kit holds promise for the humanities and social sciences.