Soraka Runes explained
There's one set of runes for Soraka on patch 14.22 that is the clear favorite for LoL players and pros alike. The best Soraka rune paths on the position 
Support are 
Sorcery as the primary path and 
Resolve as the secondary path with a pick rate of 94%. Besides picking runes on Soraka you should learn how to play Soraka and if you are interested in pro matches take a look on how a pro builds Soraka. If you want to discuss 
Soraka then you should visit the champion subreddit.
Soraka runes from primary path
Sorcery empoweres abilities of Soraka and increases the available champion resources. Most of high elo players – and our LoL pros in the the major regions – have agreed that 
Summon Aery is the best keystone rune to run on Soraka. This keystone rune adds more poke damage to your abilities. And additionally grants an extra shield, whenever Soraka empowers or protects an ally with abilities. Other primary runes on Soraka are 
Manaflow Band, 
Celerity and 
Scorch.
This is usually followed up by taking Manaflow Band for additional mana and mana regenaration. Celerity boosts all movement speed bonuses to Soraka. Scorch increases your control in the early game.
Soraka runes from secondary path
When it comes to your secondary path, most Soraka players prefer to go with Resolve. Resolve empowers the survivability of Soraka and increases the tankiness. On the Resolve path, the best runes for Soraka are 
Revitalize and 
Second Wind.
Revitalize inceases heals and shields you distribute or receive. Second Wind powers up your sustainablity in lane by healing after taking damage from an enemy champion.
FAQ for Soraka Runes
Which is the best keystone rune on Soraka?
The best keystone rune on Soraka is Summon Aery. This Soraka runes setup is then referred as Soraka Summon Aery.
What runes does Soraka use?
Runes from the paths Sorcery and Resolve are the most used runes on Soraka. For the exact pick rates of Soraka runes used, you have to study the rune distribution presented.