VERY easy to survive the ark location playing as a rogue with invisibility (and having extra potions, 20-30 should do). Use potion after getting spotted, loot containers, reenter, autosave if low hp, collect batteries. Managed to avoid most of the fighting. Maybe should do something about this. It's just... with invisibilty it is not even a challenge, seriously. Maybe i'll show it in a video, but the thing is that robots just don't spot you all the way to the command center.