A reasonable idea for a nerf to Zed in regards to QSS nerfs.
Hi, I just want to toss in my two cents (on the incoming yet passive buffs to this champion if PBE QSS comes through into live). I feel like he should deal at least 45%/55%/65% of the target's current HP for the Death mark to proc (at Level 6/11/16).
It denies a fed Zed to one V.S. one most tanks especially late game, it also rewards those who time their flash from the death mark. This also denies a lot of his burst in a 100-0 attempt if zed miss his Q's or can't proc his passive in time.
Since Zed should be able to delete most squishes late game, this shouldn't be to big of a problem for him to deal this damage late game especially with Duskblade of Draktharr, Blade of the Ruined King Active, Zed's passive and ignite.
In the early game this also shouldn't be a problem since most zed's build a BoTRK or Duskblade first and this is enough to deal the necessary damage to reach the 45%/52.5%/60% current HP damage threshold after withering his target down.
It should be obvious how Zed's Ult is supposed to execute a low HP target early game and delete a target late game so this is quite the healthy alteration to his ult. This still maintains his play style to be someone who can pop into a fight, delete a high priority target and get out for majority of the fight.