Here are my suggestions, in this order (only personnel. I would also get a QB, OL coach, and perhaps new OC):
(1) Sign Bridgewater. Now, a competent vet for Allen to learn from. He is a FA after this season, and we can outbid others for him with our cap space.
(2) Sign best FA Center available (unless he is not a "top caliber" center. Then draft one. No point in signing another Bodine/Gory)
(3) Sign at least one of: Geronomio. Allison, R. Cobb, Golden Tate, Cole Beasley, John Brown, Deonte Thompson, T. Williams.
(4) Sign one of: Coleman, Ingram, L. Murry.
Draft what you didn't get above, but don't reach. Either trade-down or take BPA.