Right now we only talk about HA between Kibana and multiple ES nodes using the client node on the Kibana side. We should expand the docs to talk about the following scenarios:

• Upgrade documentation, especially in the context of rolling upgrades
• Best practices, such as ensuring NTP is running on the Kibana server
• Hardware sizing guidance
• Setting up more than one Kibana instance pointing to the same cluster and using the same .kibana index for Kibana instance HA (Add a new documentation page on Load Balancing Across Multiple Kibana Instances #9129)
• Using HA proxy or LB instead of the client nodes for load balancing
• How to architect Kibana+ES to use cross cluster search to unify reading across multiple ES clusters