I cannot replace any items for a Rabadon's Deathcap. I don't know many high elo Cassiopeia players that normally get deathcap, especially in a meta that promotes assassin mid laners. Cassiopeia is a sustained damage mage. The longer she stays alive, the more damage she deals.

Deathcap does provide you quite a bit of damage, but whats the point of having damage if you die before you can dish it out?

Thank you for reminding me about this, I will add my reasoning to the guide when i have the chance : D

i don't think that incomplete matchups are that bad tbh.
also why don't you get Rabadon's Deathcap? it is core on pretty much every ap mage, why not on her?

The reason I posted this guide as it is, is simply because it already has the important areas completed.
I have given my opinion on exactly why ROA>Tear and I believe that is probably what everyone wants to know : P

I will update with matchups when I have time! : D
Thank you both for your comments!

Incomplete.
Finish it before you post it please.

I like this. Add a matchup chapter for counters/easy lanes!