I have uploaded the latest version of the JFrog Artifactory High Availability cluster best practices document, where the JFrog artifactory becomes the default software package artifactory in lieu of the shipped "Nexus" software package artifactory that is part of Release automation.
CA-Release-Automation-Artifactory-HA-Best-PracticesV2.5
The JFrog artifactory support starts with Release Automation 5.x.x.
Thanks
-Walter