(Category s/b CMigrator, but didn't see it on the list)

I'm interested in usingCMigrator to move a Drupal 6 internal portal (with a look of "Book" content) to a new (yet to be created) Joomla site. Of course I'd rather migrate direct to J5 at this point, but the CMigrator page says it supports up to 3.9.

How would you recommend getting to J5?

1. Build a J3.9, migrate, then upgrade J3.9 -> 4 -> 5???
   
2. Just try CMigrator on 5.x to see if it works? (Or is it *known* to not work???)
   
3. Or is there some other way?
   

Thanks in advance,