[ceph-users] Luminous upgrade question

Hi, We are thinking about upgrading our cluster currently running ceph version 12.2.12. I am wondering if we should be looking at upgrading to the latest version of Mimic or the latest version Nautilus. Can anyone here please provide a suggestion…I continue to be a little bit confused about the correct Ceph upgrade path given all the various versions that are out there currently. Thank you in advance. Shain