Ideally I'd love to see Ainge turn Sheed into Beasley, and then throw some money at Brendan Haywood. Resign Ray, and give short-term deals to Nate and TA. Perk will likely be out until midseason, so the early rotation will be:
Rondo/Nate
Ray/TA
Pierce/???
KG/Beasley
Haywood/BBD
There's a hole at backup SF that needs to be filled. TA might be able to back the 2 and the 3 and play ~25-30 minutes a game, but that leaves us with a small bench at every position. I don't expect Bradley to play early next season, and I don't expect Harangody to play at all.
Later in the year, we get Perk back and the lineup becomes:
Rondo/Nate
Ray/TA
Pierce/Beasley
KG/BBD
Perk/Haywood
We go from having a very small bench to a pretty big bench, at least on the inside. Beasley hasn't had much success as an SF so far, but I see no reason why that should continue to be the case - he's clearly athletic enough to defend the position, he can post up or shoot over nearly any 3 in the league on offense and his below-average boardwork at PF would become average or above at SF. Avery Bradley could break into the rotation to replace either TA or Nate at this point in the year, as well.
If Danny really wants to give this core another run, then I really wish we had found a way to get Damion James, either instead of or in addition to Bradley. I don't expect Bradley to help much this year (although he could prove me wrong), but Damion James would have filled pressing needs for us - we've needed a solid backup 3 for a few years now, and we desperately need somebody to help us crash the glass.