Re: Serge Ibaka is a great defender
He doesn't need to score, he's a legit starter right now. I think they could use a 4 who could score down low a little though, with Green in the 6th man role.
This team might be a year away, but they have the talent to win titles right now. Kristic goes from average to starter to really good backup, plus you have Aldrich,Collison and Mullens for depth. Green is a more than capable starter for the time being and would be elite as a 6th man, similar to Odom. Harden and ideally Maynor too need to establish themselves to fully give this team the depth they need on the perimeter. Not that it's a major need, I'm just nitpicking really.