patch League of Legends - 3.02 Patch Preview - Page 2

Hybrid penetration is awful on Akali, she deals almost strictly magic damage now, especially with the recent changes to lich bane. You should never go Rageblade or Maw on her, it's very inefficient to say the least. Generally the only AD item you'll be buying is a Gunblade. The change to her this patch allows for a little more MPen than you had before, which makes the very common Gunblade-Warmog's build a bit more effective than it was before. Welcome to the league of Warmog's.

That and Akali v Pen Runes has never been something you want to do anyway. Flat runes allow you to bump your passive as much as possible at the start.

Teemo blows with AD runes, but bringing him with AS isn't bad.

Teemo scales with AP and AS at the same time, building AD means forgoing either one of those two options that have a lot of synergy, for something that doesn't. If you build AP you're AA's will hit harder, and still benefit from your mPen, AS will do what AS does still because of that, especially with Spellblade being a thing now. AD doesn't help much, since your mPen won't help it, and nothing scales with it on Teemo.

Aka, Teemo builds = TF builds, or close enough. AD works as it's own build, but is lackluster.