I just had a crazy idea on reworking Darius's R

I was thinking it would have no AD scaling, and instead scale harder on your opponents health the more you stack on them.

Thoughts I had:

Ult does 30/45/60(+1%/1.5%/2%) max hp true damage of enemies) for every stack on the opponent(excluding first stack).

At 10 stacks, he would do max 300/450/600(+10%/15%/20% max hp true damage of enemies).

This would in a sense make him be a bigger tank buster, here is some math on how it would work.

If he ulted a 2000 hp target with 10 stacks at rank 3 ult, he would do 600+400 damage, basically half their health since their kinda squishy.

If he ulted a tank with 4500 hp with 10 stacks at rank 3 ult, he would do 600+900 damage, meaning 1500 damage.

I just had this idea pop in my head and was wondering what yall thought about it, it might seem broken but I just wanted to throw it out there xD