Thread:Shigfugjum/@comment-24922591-20140509201305/@comment-24420226-20140518195204

I might do that, though it might just be reiterating the item recommendations I already gave in the blog.

There are really only two tricks to doing penetration-focused AP builds. The first is paying attention to how much MR the enemy team has built overall. If you only see everyone with one or two MR items, just Sorc Boots and Haunting Guise will be enough to handle that. Your other items should focus on survivability and utility. Rylai's is usually my third pick up on such a build. Even if the opposing top laner has a Spirit Visage, Mercury Treads, and a Hexdrinker; if it's just him with all that MR then it's not worth your time going for more pen. Once you start seeing that almost everyone is starting to build their second MR item, then it's a good idea to get your Void Staff soon.

The second is just gauging if an Abyssal Sceptre is worth your time. If you think you're going to be in the middle of the enemy team, and/or there is a lot of magic damage on your own team, It could be a good pick up. Even if your allies aren't AP, a lot of tanks and supports deal lots of magic damage (Leona, Nautilus, Nami, Sona) and the aura will give that Solar Flare a little more 'oomph'. Feral Flare's bonus damage is also magic, so carry junglers like Udyr or Xin Zhao might appreciate it.

Hope those paragraphs helped a bit. Glad you found my blog interesting.

-Shiggy