If you have trouble landing Prismatic Barrier, remember that it returns to you after it reaches max range. Try positioning yourself to hit your allies with its return trip.
Lux has great zone control abilities. Try to set up Lucent Singularity to prevent an enemy's advance or escape.
Lucent Singularity is a great scouting tool. Try throwing it into brush before walking into it to check for ambushes.
Katarina's abilities deal magic damage, so even if she's building Attack Damage items, get magic resistance to counter her.
Try to save a disable for when Katarina uses her Death Lotus.
The stats provided here feature some important Lux versus Katarina matchup statistics that may help us grasp the differences and similarities between the two. Lux’s KDA ratio ([kills + assists] / deaths) of NaN is more than Katarina’s ratio of NaN, indicating that Lux may be more central to her team's team fighting capacity than Katarina. This observation is in large part a result of the differences in assists.
Lux typically has a significantly smaller longest kill spree than her enemy does. Commonly, she receives less damage than Katarina. This typically indicates differing health capacities, but it can also imply that the champ with increased HP has less mobility and thus is not able to flee from additional damage when poked or engaged.
Both League champions are great champions. Both champs have their pros and cons. In League's current meta, Lux usually fairs equally well when facing off against Katarina, with a 49.6% win rate. Therefore, Lux makes an ok counter to Katarina.
While Lux does have a lower winrate compared to Katarina, when facing one another, Lux also has a lower learning curve that makes her a less time consuming champion to learn. You should be careful when picking Lux into Katarina.
Moreover, Lux has a good amount of utility and CC, a similar amount to Katarina. This makes her just as valuable during team fights, especially when trying to counter champions with a ton of burst damage.
While there isn't one best champion in League of Legends, in Lux vs Katarina matchups, Katarina is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your teammates during late stage team fights.
Lux is a somewhat poor counter for Katarina. Make sure you focus your actions on maximizing your gold income and taking out objectives. If you are able to do that, you should do very well as Lux against Katarina.
To truly master Lux in order to counter Katarina during both the lane and mid / late game phases of League of Legends, you should continue reading to gather a few extra lessons on this matchup. If you pay attention to the build and tips presented here, you should grow your win rate significantly and be closer to League of Legends pro players.
Lux on average picks up less CS compared to Katarina. Champions who typically don't take much CS often don't require much CS to be effective, such as supports. They are capable of scaling properly off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often have to have many items to be effective. In either situation, try to surpass the numbers reported on this page to do well.
The most important items to use in your Lux versus Katarina build include Malignance, Zaz'Zak's Realmspike, and Stormsurge. When Lux bought at least these three pieces in her build, she performed a lot better against Katarina than with many other commonly used item sets. In fact, Lux had an average win rate of 49.6% when playing against Katarina with this counter build.
To have the highest likelihood of defeating Katarina as Lux, Lux players should equip the Arcane Comet, Manaflow Band, Transcendence, Gathering Storm, Cheap Shot, and Ultimate Hunter runes from the Sorcery and Domination rune sets. Out of all the rune combinations players chose for Lux vs Katarina counterpicks, this set of runes resulted in the best win rate. Notably, these runes provided a 49.6% win rate overall.
If you need to see Lux versus Katarina tips and builds for a a distinct rank, feel free to choose one from the selection menu displayed above. By default, the stats and build suggestions given are computed using all games run with both champions.