We have no one to guard Dirk so I see no reason to run away from our strengths in trying to stop him.
We do have hope for guarding Terry with Bowen or Hill, but Hill has greater quickness and stamina. Pop would be foolish not to give Hill a chance. If he fails then let him sit, but there's no reason not to try. We have to take a reasonable risk, and Hill is a reasonable risk.
Everyone knows that we need Gooden to play big this series if we're going to win. He's another reasonable risk we'll need to take a chance on. As many have said, he and Duncan should be given time together to make Dirk play D. And if they go large and put Bass out there as well, then we've already taken them out of their game.
Bonner looks to be completely useless in this series. His advantage as a long-distance shooting big is that he takes big players out of their comfort zone in the paint. Dirk's comfort zone is hiding out on the wing. Allowing Dirk to guard Bonner is basically allowing Dirk to rest. That is the opposite of what our strategy should be.
Mason could be exposed at the backup PG if he's expected to keep up with Barrea. Mason already has problems initiating the offense (as in, an offense that isn't just him shooting a long jumper from the top of the circle). Mason, not Hill, could become the "Beno 05" backup PG disaster that Pop worries about. If teams look to aggressively trap Mason, things could get ugly. It was already "not great" against regular season defensive schemes. For us to beat the Mavs, Mason can't become a liability at the 1.