Make sure you choose the right augment at the right time.
Death Ray is a powerful poke and a strong area of denial tool. Use it in combination with Gravity Field to control your enemy's position.
Aqua Prison is a very powerful ability with a long cooldown, take advantage of the situation if Nami misses this ability.
Tidal Wave has a very long range but travels slowly, be aware of when it is coming your way as you can move out of its path.
Try to avoid fighting an opponent affected by Tidecaller's Blessing, it lasts a short duration so waiting it out can help you greatly.
The stats shown here underscore several significant Viktor against Nami matchup stats that may help you interpret the differences between this pair of champions. For instance, Viktor’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Nami’s KDA ratio of NaN, showing that Viktor may be more central to his team's team fighting capacity than Nami. This observation is largely a result of the difference in kills.
Viktor often has a much larger longest killing spree than his enemy does. Typically, he receives a similar amount of damage to Nami. This commonly reflects differing health capacities; however, it can also show that the one champ has less mobility and thus is unable to flee from additional damage when poked or engaged.
Both League champions are great. Both have their pros and cons. In League's current meta, Viktor usually wins when trying to fight Nami, with a 53.7% win rate. Therefore, Viktor makes a great counter for Nami.
While Viktor does have a higher winrate compared to Nami, when they face off with one another, Viktor also has a much greater learning curve that makes him a more challenging champ to pick up and master. You should be be fine when picking Viktor into Namias his relative depth means that you may not be able to unleash his full potential without a lot of practice beforehand.
Furthermore, Viktor has only a small amount of CC and other utility, a similar amount to Nami. This makes her just as valuable during teamfights, especially when trying to counter champions with a ton of burst damage.
While there isn't one best champion overall in League of Legends, in Viktor vs Nami matchups, Viktor is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your team members during team fights.
Viktor is a great counter for Nami. Make sure you focus your play on keeping up your gold and cs and clearing objectives. If you are able to do that, you should do very well as Viktor against Nami.
To truly master Viktor to counter Nami during both the lane and mid / late game phases of League of Legends, you should continue reading to pick up a few extra lessons on this matchup. If you mind the build and stats shown above, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Viktor often accumulates much more CS as Nami. Champs who typically don't get many minion kills typically don't need much CS to be effective, such as support champions. 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, usually need several high cost items to be effective. In either situation, try to do better than the values displayed on this page to do well.
The most crucial items to have in your Viktor versus Nami build consist of Zhonya's Hourglass, Stormsurge, and Luden's Companion. When Viktor bought at least these three pieces in his build, he performed much better when facing Nami than with many other common counter builds. In fact, Viktor boasted an average winrate of 53.7% battling Nami with this counter build.
To have the best likelihood of vanquishing Nami as Viktor, you should take the First Strike, Magical Footwear, Biscuit Delivery, Cosmic Insight, Manaflow Band, and Transcendence runes from the Inspiration and Sorcery rune sets. Of all the rune builds players chose for Viktor vs Nami counterpicks, this sequence of runes resulted in the best win rate. Notably, these runes gave a 53.7% win rate overall.
By default, tips, statistics, and builds on how to beat Nami as Viktor are given for every ranked division. If you would like to scope the statistics and builds to a distinct skill level, you can use the selection menu earlier on the page.