Host Utilities on an RDM presented Windows 2012 cluster box

[ Edited ]

Simple.... A pair of Windows 2012 with clustering turned on has a LUN presented via vmware RDM (ram device mapping). I know VSC is required for ESX. Should HOST UTILITIES be installed. Whether needed??? or good for future diagnostics? Official stance?
     *** Running CDOT 8.3.1... ESX 5.5 with LUNs presented via FCoE...
The Install Doc states: "enable you to connect host computers to virtual disks (LUNs) on NetApp storage systems"... but then goes on to talk about HBA's which don't exists in my case [at least not at the guest level].