The only problem there is you picked the one argument that doesn't have a direct factual counter. In ALL cases, enmity combos are a DPS loss, at least until such time as you'd lose rDPS because of your damage-dealers getting picked off due to your low enmity. And that's pretty well been taken care of via Shirk so long as you have a NIN and no SAM (or Monk, if they're good enough).
THAT blanketing statement is technically correct in all cases, and trying uninformedly to throw smoke onto any one of those cases to change the result does truth no favors.