I have a crazy idea for Death Fire Touch

What if Death Fire applied to enhanced autos, but strictly from abilities? Stuff like, malphite W, Vayne Q, Kog'maw W, Camile Q, and other stuff that adds extra damage or effects onto auto attacks. It'd probably apply a specific amount based on whether the enhanced auto is single use or multi-use, but if it didn't I think it'd be much more interesting. Just something to think about.