http://efa.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/toolkits/social-media-advocacy
Setting clear expectations for a shared voice, what gets posted, and when will help the group delegate the work. These reviews can look at site metrics ("views," "shares," etc) to determine what has the biggest impact and should be replicated. With practice, you'll be more prepared to implement an internal review process to catch any mistakes or off-message posts.