Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is a quick AP carry build for Lux. I found it really good vs almost every team.
Some obivious tips:
Stay behind, bind enemy's melee carry > tanks with disables > range carry > mages. ALWAYS check brush with E. It'll save many lifes. ALWAYS spam W befor teamfight\in teamfight\after teamfight. If your team have mass disable champion like amumu or galio dont save your ulti for lasthit. Make a combo with theirs ulti and if everything done well enemy's mages and carry will be like half\low hp or even dead.
Standart Lux's combo is
Light Binding -> Lucent Singularity -> Finales Funkeln -> detonate Lucent Singularity.
If your micro is good you can add a few autoattacks to detonate Illumination. It'll look like this
Light Binding(add illumination on target) -> Lucent Singularity -> Finales Funkeln(detonate illumination and add new one) -> autoattack(detonate illumination) -> another autoattack and immidietly after attack animation is over detonate Lucent Singularity. So when your last autoattack reach enemy he will be with one more illumination charge shining above his head.
This works great until lategame. I dont recommend doing this in lategame cause of risk to be focused and killed.
I always take a midlane cause Lux is really good here and she needs farm to be ap carry. There is a few champions that Lux cant handle on mid. They are Mordekaiser, Katarina, Corki, Kassadin, Galio and may be Zilean(depends on his skill). I dont recomend to go mid vs any of them ever. And there is a few others that cause much trouble to midlane Lux but you can handle them. Its very hard but not impossible. They are Vladimir, Morgana, LeBlanc, Kennen, Malphite. Standart midlaners like Malzahar, Kartus, Ashe, Miss Fortune, Twisted Fate, Teemo, Kog'Maw, Nidalee, Sivir, Tristana is easy to handle for Lux. Most of them even easy to kill.
Some words about build.
I dont buy HP at lvl 1 cause Lux has great range of her abilities and she stays at safe range fot most of the time. I rush for sorcerer's to get early 30 magic penetration cause most of the usual midlane champions have only 30 magic resist. So i start dmging them really hard and often get a kill. People underestimate Lux's dmg so all you need is harass them with 1-2 Lucent Singularity charges and then make a standart Lux's combo that i described befor. Masterys+Runes+Meki will give you enof mana regeneration for constant E spam. But dont be greedy - 1 E for 1 wave of minions or you'll be oom soon. Also do not use Q until you are ready to kill or somebody is trying ro gank you. 1st - enemy wont be sure have you learned Q or not cause you didnt use it yet. 2nd - enemy will probably pay less attention to your position cause you didnt try to bind him yet.
Then just follow item build and my tips about teamfights. Thats all.
With full build(with elixirs) you'll have 820 AP, 2797 HP, 3675 MP, 30% CDR, 30\49% Spell penetration.
Thx for reading, this is my first guide ever and sorry for bad english =)
Feel free to criticize.