The best champion for deathfire touch

Urgot is disgusting with deathfire touch. It adds a full 8+50% ad scaling to his q harass single hits, it can easily add 16+100% scaling or more to his chase combo. It even adds a very respectable scaling to his E, which lasts 5 seconds. Since deathfire scales so much better with ad than ap, it gives him tremendous increases in harassment and overall damage done.

Also, let's not forget that Urgot deals purely physical damage, so it's nice to have such large scaling magic damage added to his kit.