Either will work, but I would prefer the push to Hive vs RSS, but either will work.
The RSS will work only if it will post the latest post on a timed check. For example, the latest post (if new) once a day. This will prevent "spamming" the blog here when I have a great day and upload more than one post at a time.
Check out my recent posts, looks like your CMS can execute Python when you post a new article so you’ll be able to use Python Beem to send that content over to Hive. The tricky part will be how you decide which are sent - perhaps use a tag?