[1.2.397] Demon Slayer (3)

I know. I was expanding on what you said, since it was kind of vague what you meant by proportional.

There was no need to expand. Proportional is fairly straight forward.
Reduce it by a percentage.

Not only does this avoid having a cool down becoming '0', it's easier to code.
It also would mean that they'd never have to adjust the code to factor in new skills.

It truly is a wonderful thing to have invincibility on invincibility while you're invincibility.

I can't wait until Divine Shield gives 1.5 seconds of invincibility after getting hit.
That plus 3 seconds of invincibility would pretty much guarantee that Divine Shield would never run out before the cool down.

Not to mention the additional invincibility given if the Potential skill affects hits blocked by Guardian...