Is getting Rondo healthy and aggressively marketing him around the league, for younger, immediately useable assets.
And then letting Pierce and Garnett retire - whenever they choose.
It should be clear to everyone by now that Pierce and Garnett will not fetch useful building blocks for a rebuild. The Nets offer for Pierce was absolutely absurd; trading Garnett for a younger, more costly version of the center Ainge offloaded two years ago and a guard who is Rondo lite, including shooting issues, accomplishes very little more.
However, Rondo is a different story. His ball-stopping, stats-driven offensive game - along with his growing ambivalence to even try to defend - are of declining use in a Doc Rivers system.
He is the Celtics' most valuable asset, albeit one of the more flawed ones.
The clearest path for Ainge is to offload a player who no longer fits in Rivers' system for assets, and await the retirement of his stars.
Then, you can start contemplating a rebuild, not just a useless collection of scrubs in Gerald Green-redux.