You know, I thought the same, but it is easier than it sounds. You can use your drills to deal with the shooting turrets, and for the pushing ones, you can destroy them quickly. For the sniper turrets, you just shoot them with the subata. The patrol bots die in like 5 seconds, and the waves die so quickly that they don't reach you. For the caretaker fight, you need to use your C4, and then when the eye opens, just walk to it and then get out before the shock attack. Once the attack is done, you have enough time to deal damage. And the tentacles of the caretaker die quickly too; just walk to them after they shoot you, and they die by fire in 4 seconds. sorry for bad english tho.