Try to stay away from walls. Ornn is much less strong if he cannot stun you.
Attack Ornn to keep him from creating items in lane.
The stat comparisons provided here underscore several important Viego against Ornn counter stats that can help you appreciate the differences and similarities between this pair of champions. For instance, Viego’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Ornn’s KDA ratio of NaN, indicating that Viego may be more central to their team's team fighting potential than Ornn. This observation is in large part a result of the difference in kills.
Viego normally has a much larger longest killing spree than their opponent does. On average, they takes a similar amount of damage to Ornn. This commonly reflects differing health capacities, but it can also hint that the one champion has less agility and thus is unable to escape additional damage when engaged or poked.
Both LoL champions are great champions. Both have their strengths, weaknesses, and counters. In League's current meta, Viego usually wins when facing off against Ornn, with a 52.5% win rate. Thus, Viego makes a good counter to Ornn.
While Viego does have a higher winrate than Ornn, when they face off with one another, Viego also has a greater level of difficulty that makes them a more time consuming champion to learn and master. You should be be fine when picking Viego into Ornn.
Additionally, Viego has some amount of CC and other utility, a similar amount to Ornn. This often makes her just as valuable during teamfights, especially when trying to counter champions with a lot of burst damage.
While there isn't a single best champion for every situation in League of Legends, in Viego vs Ornn matchups, Viego is the better champion with a noticably higher win rate, similar champion depth, and a similar amount of utility to help out your allied champions during late stage team fights.
Viego is an above average counter to Ornn. You will do well by focussing your actions on keeping up your gold and cs and taking out objectives. If you are able to do that, you should be able to stand on your own as Viego against Ornn.
To learn all of the intricacies of Viego to counter Ornn during both the early game and mid / late game phases of League of Legends, you should keep reading to pick up a few extra lessons on this matchup. If you pay attention to the build and stats shown here, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Viego on average accumulates a lot less CS compared to Ornn. Champs who typically don't get many minion kills usualy don't require much CS to be valuable teammates, such as support champions. They are capable of scaling properly off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often require a lot of items to be effective. In either case, try to exceed the values displayed here to do well.
The top items to prioritize in your Viego versus Ornn build include Death's Dance, Sundered Sky, and Kraken Slayer. When Viego bought at least these three items in their build, they performed much better vs. Ornn than with most other typical counter builds. In fact, Viego boasted an average winrate of 52.5% battling Ornn with this counter build.
To have the best likelihood of beating Ornn as Viego, you should use the Conqueror, Triumph, Legend: Alacrity, Coup de Grace, Cosmic Insight, and Magical Footwear runes from the Precision and Inspiration rune sets. Of all the rune builds players picked for Viego vs Ornn clashes, this mix of runes yielded the highest win rate. In fact, these runes gave a 52.5% win rate overall.
If you would like to get Viego x Ornn tips and builds for a an individual player tier, feel free to select one from the selection menu shown above. If viewing for the first time, the statistics and build suggestions given are calculated using every game run with these champs.