The writer in forming parallels over previous parallels will be cause the previous parallels to be malformed. Therefore when we look for parallels the well formed parallels are the last parallel that the author created. The more malformed a parallel the earlier the parallel was incorporated in the writing. We now have a means of determining the logical order of construction.
When we think of parallels we must also consider the content of the parallel and how content of one section can be migrated from one parallel to another parallel and later parallels removing that content from its original position. Identifying how something was migrated from one or more parallels gives us a tool determine a logical order of construction for the affected parallels.