User blog comment:Flyxmoloking/Opinions and why you agree/@comment-4091261-20130309003959

I think Heimerdinger would be considered UP. Heimerdinger has an extremely unreliable chasing method and focuses on defense to actually deal his damage. Then there comes the problem with aoe damage which annhilates his turrets which is one of his 2 main lines of defense. He is easily countered and his passive falls off quickly, all Heimerdinger can do is catch someone off guard and burst them.

Other than that, it's very difficult for him to contribute to a teamfight other than turrets. His ratios are low so he resorts to tankyness which also falls short because of his reliance on his low health turrets to deal dps magic damage. I would think that an invinicibilty effect on the turrets while the UPGRADE!!! buff is active would drastically improve his performance. That might sound ridiculous but it gives Heimerdinger reason to build tanky and UPGRADE!!! lasts just 6 seconds.