What if Ardent Censer kept track of the on-hit damage it provided to buffed teammates?

Simple, add a stat tracker for "added on-hit damage" to the item when highlighted.

Just had a match where I built it early, and was told it "probably didnt help really, maybe Yi a little."

Personaly I think it helped a bit more than a "little." Could be biased, but then if It tracked on-hit damage, it would be a bit clearer.