^Devouring Paws are likely better. Better heat, more damage and only slightly less HP. However, if you have a good 1-range weapon you may also want to consider physical legs.
Nightmare and Windigo are very different cores. Nightmare is extremely strong if you have access to several mythical HP plates, but since almost no one does, it's HP is a bit low. Try Brutality or Avenger if you don't have access to mythical HP plates.