I just had an idea on how DFG could be returned to the game

I was looking at the new Giant Slayer and Lord Dominik's Regards, and remembering how Faker won SKT's first championship with Ahri (but Zed got the SKT skin instead because of Popstar Ahri), and got an idea for how Deathfire Grasp could be returned to the game.

DFG was removed in the past because while it was originally designed to give burst mages an anti-tank option, it was just used by burst mages to burst squishies even faster (with no good counterplay). But looking at the Giant Slayer passive, I thought of this:

#What if DFG's magic damage amplification was dependent on how much extra max health your target has compared to you?

Giant's Slayer works like this (LDR version):

Grants up to 15% Damage against enemy champions with greater maximum health than you (+1.5% damage per 50 health difference, maxing at 500 health difference).

If we did something similar to this with DFG, it could make the item active work as it was originally intended: great versus tanks and heavies, not so good versus squishies.

However, I may be missing a big point here, so this is just food for thought. I just think that non-DOT mages right now are lacking in anti-tank options, and that DFG making a comeback could be nice for the game.