Use Death Ray in combination with Gravity to control your enemy's position.
Viktor teamfights very well so make sure to stay with your allies and use your AoE stun well in team fights.
Use Chaos Storm when enemies are grouped together for maximum damage.
LoL Viktor players will likely find him to be a complex champion to build out properly. You will see that his build changes when he is fighting either well-rounded or specialized team comps, meaning you shouldn't take the same Viktor build every game of League of Legends
The best items to include in your champion's build are: Luden's Tempest, Rabadon's Deathcap, and Lich Bane. Players who added these pieces in their builds had a much better winrate than players who worked towards other Viktor builds. Similarly, if you are fighting a varied enemy team composition, you should strongly consider getting yourself the Inspiration, and Sorcery runes. In recent games, he won the largest fraction of his matches when equipped with these runes.
We came up with our Viktor build suggestions by examining 40,270 recently ranked LoL games with him selected. We only advise the best winrate Viktor builds that were built by ranked League players enough times for us to reccomend them. With so many rounds in our dataset, we are quite confident in our recommended builds.