you have too much magic pen and i wouldnt take FoN if you alredy have spell vamp you could get another magic resist item like banshee's veil or lich bane if you like the movement speed

Not a personal fan of the build, or the guide. You're right in most of the places it counts so I'm not down voting. Simple things like spell checking and revising makes guides look better for obvious reasons.

Sloppy. But it has the idea. Although, I'm not a fan of the health runes especially, late game you'll have enough HP regen with FoN, seems much better to get the base ones that don't scale with level.

Not bad +1!