I don't know when you wrote this guide but a lot of thing inside are outdated. Essence theft doesn't grant 33% spell vamp anymore, it does heal you more the more AP and level you have and not for the amount of damage you deal.
Charm also doesn't amplify 20% bonus magic damage anymore. Instead the ratio got increased.
You could make an actual champions skill section for the tips you have. Strategy sounds kind of misleading.
In the editor tool you can tick Core Items below the full build you want to be shown as your build.