Veigar Runes explained
There's one set of runes for Veigar on patch
11.15
that is the clear favorite for LoL players and pros alike. The best Veigar Runes on the position 
Top are Domination as the primary path and
Sorcery as the secondary path with a pick rate of 100%. Besides runes you should take a look on Veigar Build and if you are interested in pro matches take a look at Veigar Probuilds. If you want to discuss
Veigar then you should visit the champion subreddit.
Primary path on Veigar
Domination improves burst damage and assassination tools on Veigar. Most of high elo players – and our LoL pros in the the major regions – have agreed that
Electrocute is the best keystone rune to run on
Veigar. This keystone rune provides burst damage, aiding them in nuking down the enemy carries. This is usually followed up by taking
Taste of Blood,
Eyeball Collection and
Ingenious Hunter.
Taste of Blood heals Veigar as soon as you damage an opposing champion.
Eyeball Collection is next up. This grants the user additional damage with every killing they score.
Ingenious Hunter gives you item haste on every unique champion takedown.
Secondary path on Veigar
When it comes to your secondary path, most
Veigar players prefer to go with
Sorcery.
Sorcery empoweres abilities of Veigar and increases the available champion resources. On the
Sorcery path, the best runes for Veigar are
Gathering Storm and
Manaflow Band.
Gathering Storm increases your late game power. This is usually followed up by taking
Manaflow Band for additional mana and mana regenaration.