If Bass is going to build a pyramid with more and more playoff bricks, I have a simple solution. Since Bass doesn't box out, hardly rebounds, and has no defensive paint presence, why play him heavy minutes?
Just play small, with KG at center, Pierce at PF, Allen, Bradley and Rondo. It would force Philly to either play Brand on Pierce or another wing player, which would be a disaster for them. At the other end, I don't think that Brand is enough of a volume scorer to do tons of damage against Pierce defending him.
With that line up, there's a lot more space for KG to post and everyone else to drive. Philly won't be able to help on KG as much either.
Defensively, this line up allows the Cs to switch on all little/little high pick/rolls, which Philly likes to run a lot. If Philly chooses to use a big to set a high pick, the Cs will have KG hedging it, with four quick guys ready to scramble if K can't contain the little on the switch.
At the six minute mark, sub in Bass for KG and bring in another big for one of the wings, and hope you're in enough of an offensive rhythm to survive until KG gets back in.