I strongly disagree with -any- build that builds both soulsealer and lich bane but no defensive items. You're asking for a huge target on your head and putting yourself in range of the enemy carries. You will be focused by any competent team.

Also, Rylai's is a waste of an item on lux. Her Q and E are already cc's, her W doesn't target enemies and the only skill that would really benefit from it is her R which would slow them for 15% every 24 seconds...not worth the 3k investment for your second build.

Also, if you opened with regrowth pendent and built philospher stone first you'd have improve laning capabilities and then still be able to follow that up with FC. Between philosopher stone and FC you'll have plenty of mp5 that makes clarity obsolete. I realize you said that it also supports your teammates, but I prefer taking clairvoyance over clarity. Also this allows you to put a point into Q (IF needed) in case of a prelane fight. Yes, your E is a slow too, but your Q roots an enemy for it's full duration (2 sec) at level 1, which is much stronger than a small slow. You'd have clairvoyance to check any bushes. I still prefer grabbing E over Q if I can get away with it but if there's a level 1 teamfight your Q will be a much better of an asset to your team. Like I said, it's one of the few skills that can root for it's full duration at level 1. Personal preference I suppose though.

Overall, not bad, just think things could be improved a bit.

Reallyyyyy nice guide, cdr worked fine for me. =]
+1