Can we REWORK Deathfire Touch?

So far when you get into LoL and play a game you can see that arround 60-75% of the players use http://vignette3.wikia.nocookie.net/leagueoflegends/images/5/58/Thunderlord's_Decree_mastery_2016.png/revision/latest?cb=20151103094742 The core users of http://vignette3.wikia.nocookie.net/leagueoflegends/images/7/71/Deathfire_Touch_mastery_2016.png/revision/latest?cb=20151103094525 are champions like and any champ with DPS, and even with the high AD ratio it still a lame option for AD champs... why? It deals magic damage, and even when it is good for AP champs (with good amounts of magic pen), it ends up being lame for AD Champs, it will scale badly into the late game and even or AP it sometimes results badly because with little amounts of MR the damage is easily reduced.

So far I will make a list of why it isn't as popular as it should be: -Deals LOW amounts of magic damage as DPS, sometimes it even deals 0 damage per second. -Only procs on abilities, while http://vignette3.wikia.nocookie.net/leagueoflegends/images/5/58/Thunderlord's_Decree_mastery_2016.png/revision/latest?cb=20151103094742 procs on almost anything. -Even when it's AD scalings are good if you are an AD champ you will deal low damage because you have no magic penetration.

How to make it more popular while keeping it controlled? *Making it work like http://vignette1.wikia.nocookie.net/leagueoflegends/images/f/fa/Spirit_of_the_Elder_Lizard_item.png/revision/latest?cb=20130710102448 did. The difference so far between the mastery and the item itself is not so big, but it needs to be controlled in order for this "rework" to actually be balanced.

But there are rather some specific points: *Instead of making DFT proc on anything like TLord it is better to make it proc on both abilities and auto attacks, the damage it deals and the duration should be controlled. *Reduce the ratios but make it deal true damage so that AD champs can use it properly.

It should be tested on the PBE multiple times with multiple adjustments to make sure it works properly, and to make sure it is not OP or UP.