You’re right - if this poll is right then we are getting six tickets out of SC.
With that said I don’t buy this poll. I think ARG will get it the closest, as they did with NH.
I’m not saying this poll is accurate, but whenever one poll gets one right (like ARG) the next time it’s often another polling firm.
It’s kind of lucky guess work on what the turnout will be. Plus if Trump is shown really ahead some of his voters may stay home and vote for Sanders in the Democrat primary instead. After all Sanders and Trump have similar appeal.