It would be nice if AD Assassins had some way to actually deal with armor.
Wouldn't have to be as strong as old Last Whisper but currently they can't really utilize the updated Last Whisper very well and black cleaver doesn't really do the trick for assassinating a pesky
with
(nearly 200 armor if he has
and
).
I was thinking something along the lines of:
+
50 AD
18 Lethality
Unique Passive Last Whisper: Gain 20% Bonus Armor Penetration
Unique Passive: (Melee Only) Gain 10% Bonus Armor Penetration per 18 lethality you have
Would be a bad rush item because it needs 2 lethality items to be on par with other last whisper, melee only because ADCs can frick off.
which isn’t bad as a 3rd item on
or 
