What about signing Steve Nash for the backup combo guard spot? He'd back up both  Rondo and Bradley, and our backcourt would essentially be the best backcourt in the world by a wide margin.
In the playoffs:
PG: Rondo (36 min), Nash (12 min)
SG: Bradley (30 min), Nash (18 min)

Wonders....

Would you give him a 2 year, 18million deal?
I would give him a one year, 10million deal. And our backcourt would be STACKED. If Green's agent demands much more money than he deserves, we can sign Pietrus for the backup SF spot.