I'd love to see them drop the whole MLE on a very good wing to take the pressure of Ray and Paul. While KG and Perk had the benefit of two very good big men backing them up and keeping their minutes down, Ray and Paul were frequently breaking the 40 minute mark. Add a strong wing that Doc feels comfortable playing, and Ray Allen hits his jumpers in the NBA Finals.
At this point I'd love the idea of Mike Miller, Peja Stojakovic, or Tracy McGrady if they get left out in the cold during the LeBron and Co. bonanza. J.J. Reddick, John Salmons, and Al Harrington also intrigue me.
If they don't pan out, at the very least a partial MLE deal for Rasual Butler, Jarvis Hayes, Quentin Richardson, Matt Barnes, and Kyle Korver would be helpful.
I don't think we need to spend a lot on another big man. BBD is ready to get the lion's share of the backup minutes at the 4/5. Even if KG and Perk only play 30 and 28 mpg respectively, I see no reason why BBD can't play 28 mpg himself, meaning we only need to find someone else to play 10 mpg. I think we could probably a vet to take the minimum to do that. Some names that intrigue include Nazr Mohammed, Brad Miller, Big Z, Ben Wallace, Rasho Nesterovich, Kurt Thomas, and Theo Ratliff.