They'll need a really impressive Summer to be challenging for the top 4. If I were a Liverpool fan I'd be looking for something like:
J. Martinez / Benteke
Moutinho
Felipe Anderson
Milner
Ings
Clyne
Keylor Navas
If Sterling leaves I think they'll also need to add some depth in that area. They could do a lot worse than getting Walcott/Nani/Salah/Nasri included in any deal. Not a chance their Summer is that impressive though.
I'd also want to see a whole raft of player's booted out irrespective of the money offered (for nothing if necessary): Balotelli, Lambert, Enrique, Johnson, Coates, Borini, Alberto, Aspas, Jones and a raft of younger player's who clearly aren't going to make it.