Reworking How Gold Divides Between Players For Kills/Assists Based On %HP Damage Done

So my idea is, make kill gold proportional to %damage dealt to champion, and assists go to whoever gets the least gold. Here's an example. Your op homeboy Graves Jangle Rip season 2 gets into a skirmish with the enemy mid laner and jungle. But he's op, he can 2v1. He's got this. Q, W, AA, E, AA, AA, R. They were both very stupid, making poor decisions and standing in his 2.05 ad ratio q while fighting him, and are down to ~15%hp each. Graves is two autos away from a double kill. He goes to right click, when suddenly, a flash of light! Is that.. OH NO IT'S A LUX ULT DOUBLE KILLSTEAL! (And don't even start with that kill secure nonsense, in this case he's easily killing both) Now before/now, homeboy graves is doing 99% of the work outplaying a 2v1 to get.. 200g. If that. Depends if they're feeding. Meanwhile all Lux had to do was press R and click and she's taking a mean ~650g back to base. In the new system? Graves jangle is reaping what he sows, he's making all that hard mullah and heading home with ~600g because he earned it. Lux may have gotten the kill (Because we know CoD fanboys incoming with the "K/D is love K/D is life") but she's going home with the 200 assist gold she deserved and ~50g for kill %hp participation, effectively rewarding players for tryharding instead of last hitting a champion after your team brought them to 200hp.