Hey everybody, this is my first build and I've used it after any other build came out and I find it much more suited. An item that is not included in the build, therefor is optional is the Mejai's Soulstealer. If your killing and/or assist spree is going well don't rule it out. Giving the fact that she is magic damage and the runes are for magic penetration I find Sorcerer's Shoes the best option, however if the enemy team as to many croud control you might want to go for some Mercury's Treads. After you got Rod of Ages, and if killing is not your thing, you may go for some defensive items such as Shureya's Reverie and Soul Shroud. Besides if the enemy team is stacking magic resist replace the Deathfire Grasp for Void Staff, and it may save your ***.
Regarding to your summoner's spells, Clarity can be pretty useless at the end so you may wanna go for the Exhaust or Flash spell.
Now, there are some useful tips while using Lux
- Lucent Singularity can be vere usefull in the beggining, by throwing in to the bushes you can see and damage any enemies in them.
-NEVER underestimate Prismatic Barrier! This skill has saved my life and my team mates more times then I can count, especialy when running away and casting it it the running direction.
-Sure Ligh Binding is great but don't waste youre skill points on it right away. Remmember: Light Binding is great to be offencive but when running away it can hold back up to 2 enemies, ever if Master Yi is using his ultimate.
-Lux's ultimates should never be cast just for the sake of damage. It is very powerfull and has brutal range, so the best way to use it is as a finisher, it never lets an enemy with low health escape for that miserable bit of life.