User blog comment:Blurghblah/LVDP Item Rework Suggestion/@comment-4593717-20130919132257

I'd say it's too cost efficient without doing the actual math, you should add cost efficiency to your analysis section.

We probably don't need a spell vamp item for AD casters though, since they're already so insanely powerful in the current meta and their damage is almost entirely based around not remaining in the fight for long. If you wouldn't build spell vamp on Fizz why would you on Zed? Know what I mean?