I personally use: RoA, Abyssal, Hourglass, Rylai's, Cooldown Shoes and Deathcap. I always get enough AP to give them a headache but also enough tankyness to piss them off

. No more 2 second deaths. 5 seconds maybe... But that hourglass is so underused nowadays, but it is so effective on some champions. 100 AP and 50 armor, yes please. I feel that a tanky lux is a happy lux, but oh well. Sometimes I'll substitute Rylais and Lich Bane, depending on how close I am in teamfights. But usually I just own from afar if I ever play lux again. Haven't since she was last f2p and she isn't on my top 3 champs to buy list (galio is top atm).