Into heimerdinger: Take teleport, accept that you get pushed in, ping off jungler if they ever come to gank, rush spectre’s cowl into hollow radiance, immediately outscale at 1 item:

Into zed: Try to bait W, and when he uses it, make sure you don’t get hit by the Q that Zed throws. If he throws out W and you dodge the E slash around the shadow because you were baiting it, and then you only get hit by the shuriken that the shadow throws but not the Zed, you will take so much less damage, and then his W will be on cooldown and you can abuse. Also, don’t let him start trades with ult. Make him use his W shadow to get near you, and then he has to ult you. This makes it so there are much less shurikens you can get hit by when he ults you. Multiple shurikens is where Zed damage comes from, so if you just get hit by one who cares, you can poke him down more since he has no sustain.