Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
The stats provided here emphasize some significant Kassadin versus Vex counter statistics that may help us interpret the differences and similarities between this pair of champions. As an example, Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Vex’s KDA ratio of NaN, indicating that Kassadin may be more central to his team's team fighting potential than Vex..
Kassadin often has a similar longest kill spree as his matchup does. Commonly, he receives more damage than Vex. This typically indicates different amounts of tankyness, yet it can also hint that the one champ has less mobility and thus is unable to escape additional harm when engaged or poked.
Both LoL champions are great. Both have their strengths, weaknesses, and counters. In League's current meta, Kassadin usually wins when facing off against Vex, with a 52.0% win rate. Therefore, Kassadin makes a good counter for Vex.
While Kassadin does have a higher win rate compared to Vex, when they face off with one another, Kassadin also has a much greater level of difficulty that makes him a more difficult champ to pick up and master. You still need to be cautious when picking Kassadin into Vexas his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Furthermore, Kassadin has some amount of CC and other utility, a similar amount to Vex. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there is not a single best champion overall in League of Legends, in Kassadin vs Vex matchups, Kassadin is the better champion with a higher win rate, more champion depth, and a similar amount of utility to help out your allies during teamfights.
Kassadin is a decent counter for Vex. You will do well by focussing your gameplay on increasing your CS and taking out objectives. If you can do that, you should do very well as Kassadin against Vex.
To truly master Kassadin in order to counter Vex during both the lane and mid / late game phases of League of Legends, you should keep reading to learn a few extra tricks and insights into this matchup. If you mind the build and tips displayed here, you will grow your win rate by a lot and be closer to League of Legends pro players.
Kassadin usually accumulates a similar amount of CS relative to Vex. Champions who on average don't get many minion kills often don't need much CS to be effective, such as support champions. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically have to have several high cost items to be effective. In either case, try to do better than the values displayed on this page to do well.
The top items to prioritize in your Kassadin versus Vex build consist of Seraph's Embrace, Rabadon's Deathcap, and Malignance. When Kassadin combined at least these three items in his build, he did much better countering Vex than with most other commonly used counter builds. In fact, Kassadin boasted an average winrate of 52.0% when countering Vex with this build.
To have the best likelihood of vanquishing Vex as Kassadin, Kassadin players should take the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune sets players picked for Kassadin vs Vex counters, this composite of runes yielded the greatest win rate. In fact, these runes averaged a 52.0% winrate overall.
If you would like to see Kassadin x Vex tips and counter stats for a an individual division rank, feel free to choose one from the selection menu provided above. If viewing for the first time, the stats and strategies displayed are computed using all rounds played with these champs.