What are you trying to get (your goal) from a new Resource Pool? (RP)
It seems like you are trying to apply a new RP to a DRS cluster. (clusterwide)
Two things to remember, a cluster in itself is a RP (parent) and a new RP attached to the cluster (child) is normally used to segment the resources of the cluster to a subset of VMs.
Are all 13 hosts consisting of the same hardware specs?
Agree with Jason.
If both the hosts are 90% utilized and Expendable is NO the RP will not go to Parent level. how would DRS help to allocate 26Ghz to VMs in this case.
DRS will through recommendations (if possible to manage)