Doc just needs to stop playing Glen Davis alongside slow footed centers.
Then he is an effective role player. Otherwise, he is not, the team defense (help defense from the bigs) declines too severely.
How should Doc manage the big man minutes?
I do think BBD is much more effective alongside KG, but the rotation is tricky.
(1) Garnett + Perkins
(2) Garnett + Davis
(3) Sheed + Perkins
(6) Davis + Perkins
(7) Garnett + Sheed
Those are the five big man combinations that I would like to see used. The first two are the best combinations and should be heavily used when Dwyane Wade is on the floor for Miami. The other three are second + third choice combinations.
In terms of minutes, it depends on Rasheed's aggressiveness in the post. I like his matchup at the power forward position. Both Haslem and Beasley are undersized power forwards who are inadequate post defenders. A long skilled post scorer like Garnett or Rasheed can be very effective against them.
If Wallace isn't taking advantage of that matchup, then I would drop him from the rotation altogether for the rest of this series. Give Perk, Garnett and Davis 30-35 minutes a night.
If, the team needed another big in the rotation (if Sheed is benched), I would use one of these combinations
(4) Garnett + Shelden
(5) Scalabrine + Perk