Shared History plugin

I have multiple editors in a single document as i want to prevent node deletion . For me the document should look like a template and users shouldnt be able to delete nodes like forms while editing. I have placed multiple editors in a document for this . I also bound single toolbar as i dont want to show a seperate toolbar for every area . Every thing was looking fine except undo , redo . I can only undo based on the editor in focus . But users may not know that they have to place cursor inside each editor . Now i am just wondering if there is a way to have shared history plugin ? THe history plugin itself is looking complex … What would be the right approach ? Has anyone already done things like this?