It would be good if you could duplicate Area Schemes with Area Lines and Areas. We can create new Schemes and copy Areas Lines between schemes, but can not duplicate Areas. The only work around is using Bonus Tools tool 51 Copy Areas http://www.kiwicodes-support.com/51_Copy_Areas or duplicate the Revit file, rename the Area Scheme in the copied file to match the new scheme and copy the Areas Level by Level (this is the only way to copy the colour scheme too). What should take a couple of minutes becomes a 30mins process...