Riot: Idea for balancing Item/Rune Damage
It would take some work but I think it would make balancing damage much easier in the future.
So the Idea is that each Champion would have a "Bonus Damage proc" Any Item or Rune that procs Damage like Electricute or Duskblade etc would follow the rules of the champion Bonus Damage Proc.
So this way you could have as examples
: One 3rd ability Damage
: On Q
: On Headshot
: On E Stun
: On W (Fear)
You could then balance when a champ gets this bonus damage in its combos and could put CDs built into the Bonus Champion damage to balance it.