Heimerdinger Runes explained
There's one set of runes for Heimerdinger on patch 15.3 that is the clear favorite for LoL players and pros alike. The best Heimerdinger rune paths on the position 
Top are 
Sorcery as the primary path and 
Inspiration as the secondary path with a pick rate of 45%. Besides picking runes on Heimerdinger you should learn how to play Heimerdinger and if you are interested in pro matches take a look on how a pro builds Heimerdinger. If you want to discuss 
Heimerdinger then you should visit the champion subreddit.
Heimerdinger runes from primary path
Sorcery empoweres abilities of Heimerdinger and increases the available champion resources. Most of high elo players – and our LoL pros in the the major regions – have agreed that Arcane Comet is the best keystone rune to run on Heimerdinger. This keystone rune adds more damage to your abilities and increases your power in the laning phase. Other primary runes on Heimerdinger are Manaflow Band, Absolute Focus and Scorch.
This is usually followed up by taking Manaflow Band for additional mana and mana regenaration. Absolute Focus grants additional damage while Heimerdinger is alomst full health. Scorch increases your control in the early game.
Heimerdinger runes from secondary path
When it comes to your secondary path, most Heimerdinger players prefer to go with Inspiration. Inspiration opens creative opportunities on Heimerdinger troughout the match. On the Inspiration path, the best runes for Heimerdinger are 
Biscuit Delivery and 
Magical Footwear.
Biscuit Delivery is a great rune for laning as it gives additional health and mana, which can help in more aggressive lanes. Magical Footwear allows Heimerdinger to focus on those essential core items without the need to spend the additional 300 gold on boots.
FAQ for Heimerdinger Runes
Which is the best keystone rune on Heimerdinger?
The best keystone rune on Heimerdinger is Arcane Comet. This Heimerdinger runes setup is then referred as Heimerdinger Arcane Comet.
What runes does Heimerdinger use?
Runes from the paths Sorcery and Inspiration are the most used runes on Heimerdinger. For the exact pick rates of Heimerdinger runes used, you have to study the rune distribution presented.