First things to be said. A renderfarm is only having the same problems a render might have, like the same scene would have rendering local. This is here truly the case, since the workstations are the barebone of the renderfarm used at the mdh.
Best practices
only render shots for which the lighting/aov-setup has been checked by rendering some stills or partial stills, and/or for which playblasts have been made to approve for animation