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.
Use the time after Sion has died to reposition and prepare for his return.
Even if Sion still hits a Decimating Smash, making him release the charge earlier reduces its impact.
The stat comparisons shown on this page show some influential Sejuani versus Sion counter statistics that may help you understand the differences and similarities between the two. Sejuani’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Sion’s ratio of NaN, showing that Sejuani may be more central to her team's team fighting capacity than Sion. This observation is in large part fueled by the differences in assists.
Sejuani usually has a similar longest kill spree as her enemy does. Typically, she takes less damage than Sion. This often reflects differing health capacities; however, it can also show that the champion with higher health has less agility and thus is not able to kite away from additional damage when poked or engaged.
Both LoL champions are great. Both have their pros and cons. In League's current meta, Sejuani usually loses when facing off against Sion, with a 48.5% win rate. Thus, Sejuani makes a poor counter to Sion.
While Sejuani does have a lower win rate than Sion, when on opposite teams, Sejuani also has a lower level of difficulty that makes her a less difficult champion to pick up and master. You should be careful when picking Sejuani into Sion.
Additionally, Sejuani has a good amount of utility and CC, a similar amount to Sion. This makes her just as valuable during teamfights, especially when fighting champions with a lot of burst damage.
While there is not one best champion in League of Legends, in Sejuani vs Sion matchups, Sion is the better champ with a lower win rate, less champion complexity, and a similar amount of utility to help out your allies during team fights.
Sejuani is a somewhat poor counter to Sion. Focus your gameplay on keeping up your gold and cs and taking out objectives. If you are able to do that, you should hold your own as Sejuani against Sion.
If you would like to learn all of the intricacies of Sejuani in order to counter Sion 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 displayed above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Sejuani typically racks up a lot less CS relative to Sion. Champs who typically don't take many minion kills often don't require much CS to be effective, such as sup champs. These kinds of champions are able to scale well off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, often require many items to be effective. In either case, try to exceed the values shown on this page to do well.
The most crucial items to have in your Sejuani versus Sion build consist of Kaenic Rookern, Sunfire Aegis, and Thornmail. When Sejuani bought at least these three items in her build, she did a lot better against Sion than with most other commonly used counter builds. In fact, Sejuani boasted an average winrate of 48.5% when countering Sion with this counter build.
To have the highest probability of annihilating Sion as Sejuani, Sejuani players should take the Aftershock, Font of Life, Conditioning, Overgrowth, Legend: Alacrity, and Triumph runes from the Resolve and Precision rune sets. Of all the runes players used for Sejuani vs Sion clashes, this combination of runes yielded the best win rate. In fact, these runes averaged a 48.5% win rate overall.
If you want to get Sejuani vs Sion tips and counter builds for a a distinct player tier, feel free to select one from the selection menu above. At first, the statistics and guides given are computed using all matches completed with both champions.