What if Redemption's Heal was based off % Missing HP?

Exact values would of course be subject to change, but I was thinking of nerfing the base heal by like 40% (so it'd be 60% of what it is currently) and making it increase by 1% per 1% of target's missing HP. That would make it a fairly major nerf at high levels of HP, but a small buff at very low HP.

As many people have noted, and as evidenced by its prevalence in all skill levels, is a bit too powerful/mandatory at the moment. Yes, I agree other support items should be buffed to be brought up to its level, and it shouldn't get huge nerfs.

This wouldn't be so much as a nerf, as is making more of a strategic item. Right now, you're better off using it fairly early on whenever a fight breaks out because the heal is big no matter what. If you made it based off % missing HP, then when you use it would be a much more strategic choice.