Why not sign a RB/LB, for example Tremoulinas instead of Fabiano, and wait out the striker injuries, and regroup in the summer.
Martinez, Amuari, DP, Toni, Pepe should be enough if he would use the 433 more often. I think we'll be better of enforcing the rb/lb position instead. Not to mention Iaq.
Fabiano is having his worst season so far, and we do not the reasons for that. For all we know he might not perform.