Against heimerdinger, Trading against Heimerdinger can be extremely tedious, yet it can be done. Taking down his Turrets Q will be the main focus in order to poke or trade with him.
 
When using your skills shots (if they’re AOE), try and aim them so they hit both Heimerdinger and his Turrets Q. This will make it easier for you to clear them down the line and increase your kill pressure in lane.
 
 Once Heimerdinger reaches level 6, his kill pressure and strength increase dramatically. Keep this in mind and beware of his empowered abilities. Against heimerdinger, Trading against Heimerdinger can be extremely tedious, but it can be done. Removing his Turrets Q will be the main focus for poke or trading with him. When you use your skill shots (if they are AOE), try to target them so that they hit both Heimerdinger and his Turrets Q. This will allow you to clean them up more easily and increase your death pressure in the way. Once Heimerdinger reaches level 6, his death pressure and strength increase considerably. Keep this in mind and attention to his abilities empowered.