Graves Runes explained
There's one set of runes for Graves on patch
11.20
that is the clear favorite for LoL players and pros alike. The best Graves Runes on the position 
Top are Precision as the primary path and
Inspiration as the secondary path with a pick rate of 92%. Besides runes you should take a look on Graves Build and if you are interested in pro matches take a look at Graves Probuilds. If you want to discuss
Graves then you should visit the champion subreddit.
Primary path on Graves
Precision improves attack and sustained damage on Graves troughout the match. Most of high elo players – and our LoL pros in the the major regions – have agreed that
Fleet Footwork is the best keystone rune to run on
Graves. This keystone rune generates you a lot of sustain and increases your survivability against poke champions in lane. This is usually followed up by taking
Presence of Mind,
Legend: Alacrity and
Last Stand.
Presence of Mind helps Graves with the mana problems by restoring missing mana, if a champion is killed.
Legend: Alacrity grants additional attack speed to Graves. With
Last Stand you deal more damage while you are at low health.
Secondary path on Graves
When it comes to your secondary path, most
Graves players prefer to go with
Inspiration.
Inspiration opens creative opportunities on Graves troughout the match. On the
Inspiration path, the best runes for Graves 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 players to focus on those essential core items without the need to spend the additional 300 gold on boots.
FAQ for Graves Runes
Which is the best keystone rune on Graves?
The best keystone rune on Graves is
Fleet Footwork.