Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
The stat comparisons shown on this page show several influential Karthus against Viego matchup stats that may help you interpret the differences between the pair. Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Viego’s KDA ratio of NaN, indicating that Karthus may be more central to his team's team fighting effectiveness than Viego..
Karthus often has a similar longest kill spree as his opponent does. Typically, he receives less damage than Viego. This often reflects differing health capacities, but it can also show that the one champion has less agility and thus is not able to flee from additional harm when poked or engaged.
Both LoL champs are great. Both have their strengths, weaknesses, and counters. In the game's current meta, Karthus usually loses when taking on Viego, with a 48.5% win rate. Therefore, Karthus makes a bad counter to Viego.
While Karthus does have a lower win rate compared to Viego, when facing one another, Karthus also has a greater difficulty level that makes him a more time consuming champ to pick up and master. You still need to be cautious when picking Karthus into Viegoas his relative depth means you may not be able to unleash his full potential without a significant amount of practice beforehand.
Additionally, Karthus also has some amount of utility and CC, a similar amount to Viego. This often makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there isn't a single best champion in League of Legends, in Karthus vs Viego matchups, Viego is the better champ with a lower win rate, more champion depth, and a similar amount of utility to help out your allied champions during team fights.
Karthus is a somewhat poor counter to Viego. You will do well by focussing your tactics on maximizing your CS and destroying objectives. If you do that, you should be able to stand on your own as Karthus against Viego.
To truly master Karthus in order to counter Viego during both the laning and mid / late game phases of League of Legends, you should continue reading to gather a few extra lessons on this matchup. If you listen to the build and suggestions presented here, you will grow your win rate by a lot and be closer to League of Legends pro players.
Karthus usually gets more CS relative to Viego. Champions who on average don't take much CS typically don't require much CS to be effective, such as supports. They are able to scale properly off of their skills, stats, and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, usually need several high cost items to be effective. In either case, try to exceed the values shown on this page to do well.
The most crucial items to use in your Karthus versus Viego build consist of Rabadon's Deathcap, Malignance, and Stormsurge. When Karthus bought at least these three items in his build, he performed much better when facing Viego than with most other common counter builds. In fact, Karthus had an average winrate of 48.5% when playing against Viego with this build.
To have the best probability of vanquishing Viego as Karthus, Karthus players should take the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Eyeball Collection, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Of all the rune builds that we analyzed for Karthus vs Viego matchups, this mix of runes yielded the best win rate. In fact, these runes averaged a 48.5% winrate overall.
By default, tips, statistics, and builds on how to beat Viego as Karthus are shown for all skill levels, merged. To narrow the stats and builds to a distinct player tier, you may use the selection menu earlier on the page.