This build violates the Geneva Conventions thus making you a war criminal. I repeat a war criminal, build this at your own safety. Irelia E and R has AP scaling and her Q deals on-hit damage. This is AP On-Hit Irelia.

First of all it gives AP as an item and as a passive. Second of all it gives omnivamp (healing while damaging) as an item and as a passive so you be healing while your enemies be dying.

Deals on-hit damage, every third auto dealing bonus magic damage and you get 10% life steal. You are a self sufficient medic. The CIA is currently hunting you as you continue to read this

The pair of items give you attack speed, one gives you AP , other gives you MR but both deal bonus ap/magic on-hit damage. The bonus damage would be like you attacking (maybe killing) a medic or an unharmed person. You war criminal

Imma be real, I don't know why you build this item unless for the on-hit damage. You'd probably be better off building Deathcap, Spirit Visage or GA. Well, beggars can't be choosers

Disclaimer: JDF holds no part in your trail for violating the Geneva Conventions. This is a heinous act punishable immensely aka 200 years. Either use the legal build or become illegal and go balls to the wind. The choice is yours.