Why does Aatrox's w(heal) not proc on towers?
Why does the heal part of Aatrox's w not proc on towers? I understand why the bonus damage part of the ability wouldn't proc on towers but it seems to me the healing part should work if it is toggled on. If you compare this ability, heal every 3rd attack, with other characters like Xin Zhao who have a similar ability, heal every third attack, there appears to be an inconsistency. Xin Zhao's heal procs on turrets but Aatrox's doesn't. Is that simply an inconsistency across champions or was it intended? In case your wondering I've pasted the numbers bellow which I have taken from the league wiki page.
Aatrox heals 20 / 25 / 30 / 35 / 40 every third attack Xin Zhao heals 30 / 35 / 40 / 45 / 50 every third attack