Otto, I have always used B) option, running ovw -mapcount first. I do thing there is a difference in what you use first, I believe I have seen it done both ways. ovw -mapcount is a troubleshooting command that checks the consistency between the map database maintained by ovw and the object database maintained by ovwdb(1M). It checks the values of map reference counts stored in the object database and corrects these values, if necessary.
The ovtopofix command is used to detect and correct inconsistencies that may have developed between the IP topology database maintained by ovtopmd and the database maintained by ovwdb for the ovw command.