User blog comment:CrashySmashy/How to ARAM with Teemo and (sometimes) Nasus/@comment-5557556-20140202181732

Rylia's is not that good on AP Teemo. Switch that for Deathfire Grasp for additional 10% cooldown and a huge chunk of AP. Teemo does 80% of his damage in shrooms, so more AP, more damage. Also Teemo's shrooms already slow so you don't need Rylai's that much. The best thing with Teemo is to go invisible in the bushes and then unleash Deathfire and Q on unsuspecting poor sould. He wouldn't know what hit him. They want to heal. Give them a fungicide remedy.

On the other hand, on Nasus is quite nice, you get a slow on your AOE.