NC State’s coaching staff appears to be complete. The Wolfpack is set to hire UMass assistant coach Brett Nelson, CBS Sports’ Jon Rothstein reported Wednesday night. Nelson brings a vast array of experience to the Wolfpack coaching staff, coaching at both mid-majors and at the Power Conference level. Nelson spent the past year with the Minutemen, where he assisted in guiding the team to a 20-11 (11-7 Atlantic 10). Before he made the trek to Amherst, Mass., Nelson was the head coach at Holy Cross for four seasons. During his time at the helm of the Crusaders, Nelson built the program from three…