No.
When he's on Green is a much better offensive player than Ariza, but a worse defensive player. We'd be trading offense for defense, but off the bench I think we probably need offense more.
Okafor again is defensively oriented. He would start with KG, which would mean only Terry, Barbosa, Ariza, Sully and Wilcox off the bench.
Terry is fine but Wilcox only scores off lobs, while Sully, Barbosa and Ariza are ver inconsistent offensively.