They could work to limit their minutes together, but then that's less time that Duncan-McDyess spend together. I'd like to see Duncan-McDyess play together, not exclusively, but almost in the playoffs. And they could do that if they inserted Splitter into the rotation.
Still, even if Blair-Bonner play five minutes together per game, they can get away with that against the Hornets, if they play them, but not only will that not cut it against the Lakers, it won't cut it against the Thunder, either. Against teams of that caliber, you can't afford to just throw five minutes per game in the garbage. Every minute needs to be valued, because of the slim margin of error.