AD Items are ALL 'on-hit' items
Just a reminder, that AD is 'on hit damage'. Best thing about this 'on hit effect' is it can crit, lifesteal, scales abilities, effects towers and benefits and benefits from multiple items and masteries!
I bring it up because I have built an AD item or two on some recent Shyvana games. Got complaints that she scales from on-hit only. Meanwhile I had perfect KDA and we won the game. But you know, elitistjerks said ignite munchi-(WoW joke)... I mean some website told me Shyvana can only build on hit items. Better rage at my fellow players for building a different item.
So just a reminder, the 'AD' number on your little stat bar? Yes, that is all ON HIT damage. With extra benefits as well!
and 
and
are not the same category of on-hit
Why not just make a bork instead lol
combo is deadly.