Well, just want to notice theres no reason for void if you have 29pen+abyssal.. 50 mpen is always enough to obliterate enemy AD or AP or Support, and even Froggen sometimes says he doesnt need void if he has Sorc boots and Abyssal :)

Anyway I voted green.

Thank you all for your advice and input! It really helps a lot and the 2 Rabadon's Deathcap was a double click on accident that I didn't realize had happened, thank you for pointing it out! I will add changes thanks to everyone's input!

2 Rabadon's Deathcap? I don't like it cause the passive work's only 1 time. How about a Rod of Ages? Ever thought about it? Nice guide. +1

Stacking Rabadon's arent really viable in my opinion. If you are fed and need more money to spend you should stack Archangels staff.

Get W first for easier harass.
Abyssal Scepter isn't that good early.
Max E before Q
2 Rabadon's and so late :7

Good start but keep on working there.

It's very good. Just a few points of critique-
Deathcaps- one is enough. It's 140 AP, but the passive +30% doesn't stack- it's unique, and for good reason.
The Spell Combo- Very good in 1v1, but in team fights you want to hit as many people as possible. Because of this, I suggest going Sear, Conflagration, Pyroclasm, Pillar of fire. While you get no stun early on, sear has a relatively low cooldown, so by the time you are ready to drop the pillar of fire, the stun is available. Also, because Conflagration is not first, You almost guarentee a passive burning on each enemy champion, which will make your Pyroclasm tear through at team faster.

Overall- Very good guide. Good work.