The Steelers will be without dependable Aaron Smith for Sunday’s big AFC NorthSmith showdown with the Bengals in Cincy.  Smith has yet to practice this week due to a sprained ligament in his left knee that he suffered in the game last Sunday with the Broncos.  “Aaron is as good a football player as we have on this team, not only on the defense,” Tomlin said. “You know what you are going to get from him. … The level of his play is consistent and consistently high.”  The role of Smith will go to former Browns lineman Nick Eason, who filled in for Smith in the base defense during the Denver game.  Also in the mix will be Travis Kirschke or Chris Hoke depending on the alignment. Rookie linebacker LaMarr Woodley may line up as an end on certain pass-rushing downs.