The only way to allow users to choose their recipients is by giving them "full" access? I wish there was a level down from full where they could choose recipients but not have access to billing or be able to delete members.
Are you referring to being able to send mailings out as opposed to just being able to create them? The 'full' type would not allow access to either billing or add/edit team members but *would* allow them to send. Is this what you are looking for?