I was speaking from a military perspective, but "Oh Yeah!" those guys are beast.
But would the Dark Troopers, Shadow Guard and Sovereign Protectors be enough to counter the SE's Sith? I think so, though it will be a bloodbath.
Well the Shadow and Sovereign are special military. :P But ya I would think so, moreso the latter seeing as they would have at least basic training in using The Force(heightened reflexes/senses, maybe a force power or two) so they could be put on the level of a Sith or at least the average sith warrior, against a true Sith Lord though they could be in trouble.