My 1 and only suggestion for Heimerdinger
His turrets(Ult turret included) Shut off IMMEDIATELY after death. No waiting around and him getting kills after he dies. Its like a Kogmaw passive except Heimer already has a passive, basically giving him 2. Heimer's damage, CD's, everything is fine except for those damn turrets not shutting off at the time of death. I've gotten killed more times by after death turrets than any time before he dies. Don't say wait it out because the only way to kill him is to dive him through the turrets and go get him cause he just stands behind then well out of the range of any champ so all he does is wait till you are on him and drop an ult turret the second before he dies and then goes 1 for 1 because you can't possibly get out if you aren't an assassin or have flash