This trick is especially useful on the God or Titan difficulty setting. During the part where you must protect the Translator from the three waves of enemies, there is a way you can do it a little easier. For the first two wave of enemies (the waves before the part when Kratos drops the Translator and kneels beside the book), you can hide behind the cage and hit the enemies, taking minor or no damage. Once you grab him and walk out the cage for the first time, there will be an intermission sequence that releases the first set of enemies. Go back in the cage and pull the boulder off the switch. Then, use the Hammer's L1 attack in the air or L1 + Triangle to hit enemies with the Hammer's attack wave. Once the first set of enemies is over, walk towards the middle to activate the second set. Take your time. Once you see the enemies appear, run back behind the cage and pull the stone off again. Repeat the same process and you should be able to avoid getting hit.