The Lakers should use Troy Murphy in this series to spread the floor. Use him against Ibaka or Collison. Neither one of those players is talented enough offensively to punish his weak D. Let Murphy space out the floor for post threats (Pau, Bynum, Kobe, Artest) and dribble penetration (Sessions, Kobe).
Jordan Hill is doing a nice job on the boards but he is a non-threat offensively and not an impact defender. They need a PF who can shoot a jump-shot.