Multiple dropdown menus are very taxing for users. We are all more or less used that if you don’t see an action on screen it must me somewhere in a “More...” menu. But if you have five, it becomes a wild goose chase.
Two top menus split navigation (Imbox/Feed/Paper trail in one, Drafts/Clips/Contacts in another). Two “...” menus have the same icon, but have different actions (Reply/Forward/Delete in both, Labels in one, Spam in another).