I would offer him easily 11-12 mil. He's a strong hustle player who improved his shooting by a lot, can space the floor, and defend one through four. SF or PF, he always does the small impactful things on the court.
I would sell a lot of our picks or trade to move this year in hopes of landing DMC. Two Nets pick, Cavs, our pick in 15 draft, Sullinger, Bradley, Wright or Zeller plus filler for DMC, do whatever we can to nab him while keeping Smart and Young.
Our future would be Smart, Young, Green, KO, and Cousins.