Melee allies can stack Frost for your Permafrost, keep an eye on who they are attacking.
Save Glacial Prison for encounters where you have teammates present to take advantage of it.
Use Arctic Assault to escape bad situations, interupt channeled spells or chase runners.
Pale Cascade orbs only last a few seconds. Avoid Diana and engage her after the shield dissipates.
Diana can play very aggressively if she uses Lunar Rush without Moonlight, but you can punish her by slowing or stunning her when she has no way to get back into position.
Dodge Crescent Strike, or move to safety if you are affected by Moonlight.
The stat comparisons provided here underscore several influential Sejuani vs. Diana matchup statistics that can help you explain the differences and similarities between this set of champions. For instance, Sejuani’s KDA ratio ([kills + assists] / deaths) of NaN is more than Diana’s ratio of NaN, showing that Sejuani may be more central to her team's team fighting capacity than Diana. This observation is in large part caused by the differences in assists.
Sejuani often has a significantly smaller longest kill spree than her foe does. On average, she takes more damage than Diana. This typically indicates differing health capacities, yet it can also indicate that the champion with more health has less mobility and thus is not able to flee from additional damage when engaged or poked.
Both League champs are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Sejuani usually loses when taking on Diana, with a 45.6% win rate. Thus, Sejuani makes a bad counter to Diana.
While Sejuani does have a much lower winrate than Diana, when they face off with one another, Sejuani also has a greater learning curve that makes her a more complex champion to pick up and master. You should expect to face a difficult match when picking Sejuani into Diana.
Furthermore, Sejuani has a good amount of utility and CC, a similar amount to Diana. This often makes her just as valuable during team fights, especially when fighting champions with a ton of burst damage.
While there isn't a single best champion for every situation in League of Legends, in Sejuani vs Diana matchups, Diana is the better champ with a much lower win rate, similar champion depth, and a similar amount of utility to help out your team members during late stage team fights.
Sejuani is a trash counter for Diana. You will do well by focussing your tactics on increasing your gold and cs and destroying objectives. If you are able to do that, you should do very well as Sejuani against Diana.
To truly master Sejuani in order to counter Diana during both the early game and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tricks and insights into this matchup. If you listen to the build and tips displayed above, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Sejuani most often picks up less CS as Diana. Champs who on average don't acquire much CS typically don't require much CS to be valuable teammates, such as sup champs. They are able to scale well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, usually have to have many items to be effective. In either case, try to surpass the values shown on this page to do well.
The best items to have in your Sejuani versus Diana build include Sunfire Aegis, Thornmail, and Force of Nature. When Sejuani included at least these three items in her build, she did much better vs Diana than with many other typical builds. In fact, Sejuani boasted an average winrate of 45.6% battling Diana with these items in her kit.
To have the best probability of beating Diana as Sejuani, Sejuani players should equip the Aftershock, Font of Life, Conditioning, Overgrowth, Legend: Alacrity, and Triumph runes from the Resolve and Precision rune sets. Out of all the runes players chose for Sejuani vs Diana face-offs, this sequence of runes yielded the highest win rate. Moreover, these runes provided a 45.6% win rate overall.
If you need to see Sejuani vs Diana tips and matchup stats and build suggestions for a an individual rank, feel free to choose one from the selection menu above. By default, the stats and build suggestions given are computed using every round with data with both champions.