A lot of opinions crowding Cairo Station. I personally find that taking the sword form the first hangar battle makes dealing the next hangar battle much easier against the Zealot-bodyguards. I'm a close range type of guy so I tend to do better over in these parts. A lot of people say using a sword is impossible over there and that I get lucky or I'm lying, but the Zealot-bodyguards are hesitant to shoot if you are near them. Just watch out for the Zealot himself. He tends to charge as soon as possible, so stick him just a little after you have engaged the bodyguards. Just my two cents, but the hardest part of Cairo Station is after you get past the armory.