I propose to add a new tab on Wiktionary Cognate Dashboard in order to display a list of the pages that are the most linked over all the Wiktionaries.
Wiktionary contributors might be interested to know which entries are the most popular so as to improve these pages first (add pronunciation, synonyms, etc). Since these entries exists on a large number of Wiktionaries, they might find a lot of information to add trough all the Wiktionary editions.
This list might also be used by Lingua Libre in order to identify which "popular" words do not have yet any audio pronunciation.
What would be even more interesting would be to have a list sorted by language, but this is the same problem as the one mentionned by Lea previously.