Suggestion to "fix" conqueror

I think conqueror is too strong on some champions like darius. My suggestion would be removing the bonus AD gained, but increasing the true damage from 20% to 25%. This would also fit more bruisers in general like ap bruisers.

While you might think: "why increase the true damage, that is too busted?". But the truth is, it would cause champions like garen or darius that has already armor reduction in their kit, to be less effective wielding this keystone and others to benefit more from it.