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.
Rumble deals almost entirely magic damage. Build some Magic Resistance to reduce his damage.
Watch Rumble's Heat bar carefully. If you see him Overheat, go in for the kill while his skills are disabled.
Rumble's ultimate can deal a lot of damage if you stay inside the area of effect. When you see the missiles falling, move out of the way as quickly as possible.
The stat comparisons shown here show several critical Karthus vs. Rumble matchup stats that may help you distinguish the differences between the pair. For instance, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Rumble’s KDA ratio of NaN, indicating that Karthus may be more central to his team's team fighting capability than Rumble..
Karthus usually has a similar longest killing spree as his foe does. Commonly, he receives a similar amount of damage to Rumble. This typically indicates differing health capacities; however, it can also indicate that the one champ has less agility and thus is unable to kite away from further harm when engaged or poked.
Both League champions are great. Both have their strengths, weaknesses, and counters. In the game's current meta, Karthus usually wins when trying to fight Rumble, with a 51.5% win rate. Therefore, Karthus makes a good counter for Rumble.
While Karthus does have a higher win rate compared to Rumble, when on opposite teams, Karthus also has a lower level of difficulty that makes him a less complex champion to pick up and master. You should be careful when picking Karthus into Rumbleas his relative depth means you may not be able to reach his full potential without a significant amount of practice beforehand.
Additionally, Karthus also has some amount of CC and other utility, a similar amount to Rumble. This often makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there is not a single best champion in League of Legends, in Karthus vs Rumble matchups, Karthus is the better champion with a higher win rate, less champion complexity, and a similar amount of utility to help out your team members during late stage team fights.
Karthus is a decent counter for Rumble. You will do well by focussing your actions on maximizing your gold and cs and destroying objectives. If you can do that, you should be able to stand on your own as Karthus against Rumble.
To truly master Karthus in order to counter Rumble during both the early game 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 listen to the build and tips presented above, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Karthus often picks up less CS relative to Rumble. Champs who typically don't take much CS typically don't require much CS to be effective, such as sup champs. These kinds of champions are capable of scaling well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often 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 important items to use in your Karthus versus Rumble build include Malignance, Shadowflame, and Stormsurge. When Karthus included at least these three pieces in his build, he performed significantly better when fighting Rumble than with most other commonly used item sets. In fact, Karthus had an average win rate of 51.5% when playing against Rumble with this counter build.
To have the best chance of defeating Rumble 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 we have analyed for Karthus vs Rumble counters, this mixture of runes yielded the greatest win rate. In fact, these runes gave a 51.5% win rate overall.
If you need to get Karthus vs Rumble tips and builds for a a particular division, please select one from the selection menu above. If viewing for the first time, the stats and build suggestions shown are calculated using every match with data with both champs.