User blog comment:NydusTemplar/A 'What If' about Champion Kill Rewards/@comment-50.53.137.54-20130210154937/@comment-5088437-20130211010146

It would only be in certain situations, such as if the ADC or Darius in this case, had already gotten multiple kills while the other champion in question hadn't.

In an average duo lane situation, the ADC would get 300, 260 etc etc from kills while the support would get 150, 140 etc etc as their number assists grow.

Think of assists as their own seperate counter similiar to kills, which slowly degrades seperately.