A decent Heimerdinger doesn't need Doran's for the extra HP.

Skill ordering's also wonky. If you stall the maxing of any specific skill, it means a weaker early game, which can let the enemy snowball.

Also not a fan of using Ghost on Heimerdinger.
With your Rocket range, and immobile turrets, Heimerdinger is the last person to be chasing anyone, and you already have Flash.

-1 for me.

yea rly all i use it for is the stun/blind/vision.... however it does do pretty good dmg but when ppl see hiemer coming toward them they kno its for the granade hit and its easily avoidable so its better used, to me, for the cc and vision

I like the idea of only putting one point into grenade early game.

„How to avoid death” build I see. Nice but not perfect.