Before any get on me about this, I am not trying to trash any of the bench players abilities (except POB who will not be mentioned again)
This about fit and enhancing of skills of players together.
Two different sets.
Set 1
House and Tony Allen. Both are SGs. One is small but a snipper. One is athletic but has many mental lapses. When they are on the floor together as a backcourt, they just don't play well together. Sure, one might have a hot night here and there. But almost never together. The problem, neither are PGs. Both struggle to run the offense. Neither give the ball or get the ball in their sweet spots enough.
Answer, Gabe Pruitt and Rondo. One of those two should be out there whenever possible. Both have shown the ability to relieve pressure off House and TA and allow them to play their game.
As to who plays between House and TA, go by opponent and team need at that point.
Set 2
Powe and Davis. Both are small PFs. Both play relatively in the same area. Both are cappable of throwing out a big game, but never together. Usually when one of them have a big game, it is when they get extended time next to KG.
Answer, Scali. When Scali is out there with one of them, it creates a hybrid small ball. Offensively, Scali's outside shooting is small ball like, but defensively, Scali can guard PFs straight up. This pulls one of the other teams bigs out of the painted area leaving more space for Powe or Davis to work.
2nd answer till Scali returns, play them along side Perk or KG more.
Both sets have their issues that can be overcame at once. But when both sets are on the floor together, watch out. The 5th member on the floor (Pierce or Ray) also struggle. (as seen last night)
I know this has all been said before, and will likely be said again.