First with TMac. His name was floated around in some trade rumors but now it appears he might actually be bought out (NY latest rumor if he is bought out). He might be harder than you think for Houston to trade him because they might not want to take much salary back as they would have to match his substantial salary in incoming money. If and it's a big if he is back in shape I would love him as a 6th or 7th man. You could have a 3 man rotation with TMac, Ray, and Pierce to keep them all fresh. If you sell him on 25 to 30 minutes a game with a chance of a ring he might buy in and would be the instant go to guy off the bench.
Our rebounding and interior defense is suffering and KG improving is a big question mark in most of our eyes. What we need from our big guys off the bench is not so much scoring but rebounding and defense. Camby is not far removed from defensive player of the year and is averaging 12 boards a game. The Clippers seem to be out of the playoff hunt so they might be looking to trade him. I would consider offering them Davis, Scal, and either TA or House, maybe a draft pick, and see if they bite.
Our team would then look like.
Perk Wallace
KG Camby
Pierce TMac
R Allen Daniels
Rondo House or TA
Camby's defense and rebounding and TMac's scoring prowess would help our bench a ton.
This would also open 2 additional spots for more possible buyouts to add to the team.