If we're really looking to replace Allen with a vet, CJ Miles would be a nice addition. He's 6'6", can slash to the basket and can shoot from the perimeter. He would be a good combination with either Rondo or Terry. Plus the height factor is always good in defending big SG's like Kobe, Roy, Harden.
If not, then Doc should play Moore. He has a good shot and with exposure I think he would do well.