Thanks for the feedback! Lich bane is purely situational, I take it to throw out as much damage as I possibly can in the shortest time! If you cast your E, land basic attack, Q, basic attack, its a hell of a lot of damage (x2 of your base AP as far as I know.) If im getting hurt badly by mages I will take Abyssal instead, hence why I put in the 'other viable items' section.

Voted +1.
I agreed with most of the build. However, I still don't get why lich bane, since there are much better items than it like Abyssal Scepter if you want MR, and Rod of Ages for mana plus you get health, with 80 ability power once it gets maxed out. I did look at what you said about lich bane, but I still wouldn't agree with it. On the other hand, the guide is decent.