Using Rupture on creeps in combination with Carnivore is a good way to gain Health and Mana.
If you're having difficulty feasting upon champions, try eating minions until you're larger.
Try to line up your attacks with Vorpal Spikes so that they kill minions and harass enemy champions at the same time.
Be careful about how close you let Viktor get to you. Viktor's control of the battlefield increases with his proximity to his opponent.
Be aware of how many augments Viktor has upgraded by looking at the color of the light on his staff (purple, yellow, blue, red).
The stat comparisons shown here show several valuable Cho'Gath vs. Viktor counter stats that may help us explain the differences and similarities between these two champions. For instance, Cho'Gath’s KDA ratio ([kills + assists] / deaths) of NaN is better than Viktor’s KDA ratio of NaN, indicating that Cho'Gath may be more central to his team's team fighting potential than Viktor..
Cho'Gath often has a similar longest killing spree as his foe does. On average, he takes more damage than Viktor. This commonly reflects different amounts of tankyness; however, it can also show that the one champion has less agility and thus is unable to escape further damage when poked or engaged.
Both League of Legends champions are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Cho'Gath usually fairs equally well when taking on Viktor, with a 49.7% win rate. Therefore, Cho'Gath makes an ok counter to Viktor.
While Cho'Gath does have a lower winrate than Viktor, when on opposite teams, Cho'Gath also has a much lower learning curve that makes him a less difficult champion to develop with. You still need to be cautious when picking Cho'Gath into Viktor.
Furthermore, Cho'Gath also has some amount of utility and CC, a similar amount to Viktor. This makes her just as valuable during teamfights, especially when fighting champions with a ton of burst damage.
While there is not one best champion for every situation in League of Legends, in Cho'Gath vs Viktor matchups, Viktor is the better champion with a similar win rate, less champion complexity, and a similar amount of utility to help out your allied champions during team fights.
Cho'Gath is a somewhat poor counter to Viktor. You will do well by focussing your actions on increasing your gold and cs and taking out objectives. If you can do that, you should do very well as Cho'Gath against Viktor.
To learn all of the intricacies of Cho'Gath to counter Viktor during both the laning and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tips and tricks for this matchup. If you listen to the build and stats displayed here, you should grow your win rate significantly and be closer to League of Legends pro players.
Cho'Gath on average accumulates a similar amount of CS as Viktor. Champs who on average don't get many minion kills often don't have to have much CS to be effective, such as supports. These kinds of champions are capable of scaling well off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, typically require many items to be effective. In either case, try to exceed the numbers shown here to do well.
The best items to prioritize in your Cho'Gath versus Viktor build consist of Unending Despair, Sunfire Aegis, and Heartsteel. When Cho'Gath bought at least these three items in his build, he performed a lot better when fighting Viktor than with most other common counter builds. In fact, Cho'Gath boasted an average win rate of 49.7% when countering Viktor with these items in his kit.
To have the highest likelihood of coming out on top against Viktor as Cho'Gath, you should take the Grasp of the Undying, Demolish, Conditioning, Overgrowth, Legend: Tenacity, and Triumph runes from the Resolve and Precision rune sets. Out of all the rune combinations players used for Cho'Gath vs Viktor clashes, this mix of runes resulted in the greatest win rate. Notably, these runes provided a 49.7% winrate overall.
If you would like to see Cho'Gath versus Viktor tips and matchup stats and build suggestions for a a specific division, feel free to choose one from the selection menu provided above. By default, the stats and build suggestions displayed are computed using every game with data with both champs.