Improving Shaco (mainly AP Shaco), even by just a little

As of now, AP Shaco takes arguably the most brain power to succeed and win lane. But even someone who has played thousands of hours on AP Shaco, like Pink Ward, still has an extremely difficult time even making it to midgame without being 0/10. One way to improve AP Shaco a little bit is to add a Teemo-like poison damage over time. The master assassin Shaco certainly has collected thousands of poisons and chemicals over his travels.. But instead of using a good poison he instead laces his Two-Shiv Poison with a useless poison that only minorly slows the enemy? I think his E should have an AP scaling damage over time poison, or he could choose a Shiv to throw like twisted fate's cards, whether he wants to use a slowing poison or a damage over time poison. This will help AP Shaco while not making it too broken.