Having a the ZVM configured with only 2 CPU processors, no hot add for CPU or Mem and only 4GB of memory is not good when this server is crucial in recovering Client sites. 

Using the Evacuate Host and Populate Host in this location is mainly only used for Production sites NOT recovery Sites. 

Going to the Setup tab of the ZVM page bottom of the left menu, going to the elipsis at the right of any HOST provides you a list of options, the option “Change VM Recovery VRA” allows you to manually balance the VMs across all Hosts but needs to be checked before the machines are in Failover test or real failover. Here is where you can seperate a client so they are across all of the hosts.