I think the money move is trading Nate and Daniels for a SF, especially one that can play a small PF spot. West seems on pace to heal quickly and they can go with AB in the meantime.
Rondo / AB
Ray / Pierce / AB
Pierce / (SF new guy)
KG / Baby / (SF new guy)
Shaq / Baby / Semi
Adding a 2 guard doesn't help the bench - the problems are in the front court. I think if they could get a combo forward that would be best, a big SF for the matchups where Ray is over matched at SF, and short term depth in the front court.
Then if everyone gets healthy the depth chart looks like:
Rondo / AB
Ray / West / Wafer
Pierce / SF
KG / Baby / Harangody
Shaq / Perk / JO / Semi
And the rotation is probably the starters, plus West and the new SF, Baby and whichever of the two bench centers is healthier / playing better.
If your not improving the lineup cohesion - I wouldn't rock the boat from a chemistry stand point. Plus Rudy doesn't have the versatility to get enough PT off the bench (bad option at PG and SF.) Mayo is better, especially if you have West and him as the two backup wings, you get a bit more size and defensive tenacity, still there would be times when your reserves are over matched a fair amount size wise at the wings.