Going all out
One flick of a finger and the large nail from Unzoku had come flying off. That was all it took to kill Hinto. It was an impressive feat that showed somewhat the strength of the demon king already.
Unlike the clones that Quinn or Sil would make, Russ' creations were different. Both Sil's as well as Quinn's clones needed to only be hit a few times for them to disappear. They weren't like the real thing.
Sil's were closer and better than Quinn's clones, since they would have the same amount of power output and could survive a few hits here and there, but still they weren't a match for the original.
Whereas, Russ's creations were completely different. They were sturdy, they could take several hits and were close to being as good as the real thing. In truth, they were as strong as the imagination that they were pulled from. That was the margin of error.