Not Updated For Current Season
Ok so this is my first build post and its with the new champ, so tell me how I did and how I can approve this guide. I only posted 5 items up because that is basically as far as I've gotten in a game with Lux, but fear not I do have some suggestions I'd like throw out for the final item.
Since I don't really know how to make this fancy I'll just type it out.
Possible 6th items
3rd Archangel's Staff-more mana equals more ability power and you get more ability power.
Lich's Bane-get some movement speed, magic resist, ability power and more mana (although not like you'll need more other than for the 2 archangel's staffs anyways) and your basic attack will hurt more, in case you do use her passive.
Manamune-This one is experimental but you can get some good basic attack with it and more mana to enhance the archangel staves
Void Saff-AP and Magic Pen, in case of those who are going anti mage
Now I've noticed that the calculator isn't really giving the real numbers you see on your character and just what is added to the character. So I would like to say that you'll easily have over close to 700AP with just the 5 items. I did 100k damage to someone so the damage is great. Now as far as strategy, I go as with the mentality of support in the sense of, "deal as much damage so my team can kill them faster and snare those who are the most threat." I level the snare last cause from what I've seen is that leveling it up only really increases damage, but her ult and E spell will do just fine til then.
Basic combo: E, Q, R or E, attack, Q, R (if your close enough) or just Q R since by late game you'll deal tons of damage anyways and the ult has a short cd.
Just realized this but I didn't go over my build order so here it is:
Doran Ring and Health Pot (or mana Pot, i switch honestly)
Tear of Goddess and Boots of Speed (if you don't have enough for both get the Tear)
Arch Angel Staff 1
Tear of Goddess
Rod of Ages
Arch Angel Staff 2