ARMCI_NETWORK=MPI-TS will result in extremely poor performance on Archer. I would encourage you to follow the instructions in the nwchem github wiki to get ARMCI_NETWORK=MPI-PR to work
Thank you for letting me know this is the case. However, I am trying to link NWChem with ChemShell and that supposedly has a problem with MPI-PR.
I'll talk to the ChemShell developers and let them know.