Jarvan IV Runes explained
There's one set of runes for Jarvan IV on patch 14.23 that is the clear favorite for LoL players and pros alike. The best Jarvan IV rune paths on the position 
Jungle are 
Precision as the primary path and 
Inspiration as the secondary path with a pick rate of 91%. Besides picking runes on Jarvan IV you should learn how to play Jarvan IV and if you are interested in pro matches take a look on how a pro builds Jarvan IV. If you want to discuss 
Jarvan IV then you should visit the champion subreddit.
Jarvan IV runes from primary path
Precision improves attack and sustained damage on Jarvan IV troughout the match. Most of high elo players – and our LoL pros in the the major regions – have agreed that 
Conqueror is the best keystone rune to run on Jarvan IV. This keystone rune provides additional power in the later stages of a game. As soon as Conqueror is fully charged, Jarvan IV deals additional damage and gains life steal. Other primary runes on Jarvan IV are 
Triumph, 
Legend: Alacrity and 
Cut Down.
Triumph restores on Jarvan IV a part of missing health and award bonus gold, if a champion is killed. Legend: Alacrity grants additional attack speed to Jarvan IV. If the enemy team consists of multiple tanks, then the rune Cut Down is the best choice.
Jarvan IV runes from secondary path
When it comes to your secondary path, most Jarvan IV players prefer to go with Inspiration. Inspiration opens creative opportunities on Jarvan IV troughout the match. On the Inspiration path, the best runes for JarvanIV are 
Cosmic Insight and 
Magical Footwear.
Cosmic Insight grants summoner spell and item haste. Magical Footwear allows Jarvan IV to focus on those essential core items without the need to spend the additional 300 gold on boots.
FAQ for Jarvan IV Runes
Which is the best keystone rune on Jarvan IV?
The best keystone rune on Jarvan IV is Conqueror. This Jarvan IV runes setup is then referred as Jarvan IV Conqueror.
What runes does Jarvan IV use?
Runes from the paths Precision and Inspiration are the most used runes on Jarvan IV. For the exact pick rates of Jarvan IV runes used, you have to study the rune distribution presented.