Remove the lethality from EoN, undo the CD buff, price remains the same.
Problem solved.
It's stat efficiency would change from 99% to 89% from stats alone which puts it more in line with something like Zhonyas (92% from stats alone)
EoN becomes the situational niche item it was intended as for assassins and melee fighters that are instantly getting chain CCed instead of another stat stick that makes engaging on ranged champions impossible and stacking more lethality
This seems like a fair solution.
as a viable item on ADCs and Assassins,
should be changed to;
+ 
+ and simply change the active shield to a straight-forward cleanse, like that EoN maintains a good amount of MR + Lethality, but has a more balanceable active with an existing mechanic.
became a huge problem when it had Lethality because Assassins could reliably out-trade mages due to the combination of peneatrion, MR and the passive. Edge of Night just recreates that problem with an active that has way more uptime and consistency. Furthermore,
should be purchased every game by mages regardless of the enemy team composition. It doesn't make sense.