Tahm Kench Runes explained
There's one set of runes for Tahm Kench on patch 14.12 that is the clear favorite for LoL players and pros alike. The best Tahm Kench rune paths on the position 
Support are 
Resolve as the primary path and 
Inspiration as the secondary path with a pick rate of 65%. Besides picking runes on Tahm Kench you should learn how to play Tahm Kench and if you are interested in pro matches take a look on how a pro builds Tahm Kench. If you want to discuss 
Tahm Kench then you should visit the champion subreddit.
Tahm Kench runes from primary path
Resolve empowers the survivability of Tahm Kench and increases the tankiness. Most of high elo players – and our LoL pros in the the major regions – have agreed that 
Unsealed Spellbook is the best keystone rune to run on Tahm Kench. This keystone rune allows Tahm Kench to create a one-time use summoner spell. The new summoner spell replaces one of their current summoner spells and remains available until it is used or replaced. Unsealed Spellbook has some unique rules in that a particular summoner spell cannot be selected again until three other unique spells have been taken. LoL pro players will often use Unsealed Spellbook to aid them in their current or upcoming situation. Are you about to fight the last dragon for a soul buff? Due to Unsealed Spellbook, Tahm Kench can choose 
Smite to help their jungler secure the dragon for the team. There are numberless circumstances where a particular summoner spell can turn the game on its head, and that's where Unsealed Spellbook shines the most. Other primary runes on Tahm Kench are 
Font of Life, 
Second Wind and 
Overgrowth.
Font of Life provides your teammates with more sustain by healing them whenever they attack a champion whose movement you've recently impaired. Second Wind powers up your sustainablity in lane by healing after taking damage from an enemy champion. Overgrowth increases your maximum amount of health.
Tahm Kench runes from secondary path
When it comes to your secondary path, most Tahm Kench players prefer to go with Inspiration. Inspiration opens creative opportunities on Tahm Kench troughout the match. On the Inspiration path, the best runes for TahmKench are 
Biscuit Delivery and 
Cosmic Insight.
Biscuit Delivery is a great rune for laning as it gives additional health and mana, which can help in more aggressive lanes. Cosmic Insight grants summoner spell and item haste.
FAQ for Tahm Kench Runes
Which is the best keystone rune on Tahm Kench?
The best keystone rune on Tahm Kench is Unsealed Spellbook. This Tahm Kench runes setup is then referred as Tahm Kench Unsealed Spellbook.
What runes does Tahm Kench use?
Runes from the paths Resolve and Inspiration are the most used runes on Tahm Kench. For the exact pick rates of Tahm Kench runes used, you have to study the rune distribution presented.