While laning, try to use Death's Hand's piercing damage to damage opponents from a safe distance.
Vision of Empire is quite difficult to land on its own, look for skirmishes around the map where enemies may be distracted or crowd controlled so you can land it more easily.
If you're having trouble rooting an enemy with Nevermove, try throwing it at opponents when they are near their minions so the explosion surprises them.
Demonic Ascension may make Swain very hard to kill but he's pretty easy to get away from. Try building items that can slow opponents to keep them in range if their mobility is overwhelming.
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 clarify some valuable Swain vs. Sion matchup statistics that may help us grasp the differences between this pair of champs. As an example, Swain’s KDA ratio ([kills + assists] / deaths) of NaN is more than Sion’s ratio of NaN, indicating that Swain may be more central to his team's team fighting capability than Sion. This observation is largely a result of the differences in assists.
Swain often has a slightly larger longest killing spree than his counter does. Typically, he receives less damage than Sion. This commonly reflects differing health capacities, but it can also show that the one champion has less agility and thus is unable to escape further damage when poked or engaged.
Both League champions are great. Both have their strengths, weaknesses, and counters. In the game's current meta, Swain usually wins when facing off against Sion, with a 53.0% win rate. As a result, Swain makes a good counter for Sion.
While Swain does have a higher win rate than Sion, when they face off with one another, Swain also has a much greater level of difficulty that makes him a more complex champ to learn. You don't need to be too worried when picking Swain into Sionas his relative depth means that you may not be able to unleash his full potential without a lot of practice beforehand.
Furthermore, Swain has some amount of CC and other utility, a similar amount to Sion. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there isn't one best champion overall in League of Legends, in Swain vs Sion matchups, Swain is the better champ with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Swain is an above average counter for Sion. Make sure you focus your strategy on maximizing your gold and cs and clearing objectives. If you do that, you should do very well as Swain against Sion.
If you would like to truly master Swain 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 pay attention to the build and tips shown here, you will increase your win rate significantly and be closer to League of Legends pro players.
Swain on average gets less CS relative to Sion. Champs who typically don't earn much CS usualy don't require much CS to be valuable teammates, such as support champions. These kinds of champions are capable of scaling properly off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often have to have a lot of items to be effective. In either case, try to do better than the values shown on this page to do well.
The best items to have in your Swain versus Sion build consist of Rylai's Crystal Scepter, Malignance, and Liandry's Torment. When Swain bought at least these three items in his build, he did significantly better countering Sion than with many other typical item sets. In fact, Swain had an average win rate of 53.0% when countering Sion with these items in his kit.
To have the highest likelihood of vanquishing Sion as Swain, you should use the Conqueror, Presence of Mind, Legend: Tenacity, Last Stand, Conditioning, and Overgrowth runes from the Precision and Resolve rune sets. Out of all the rune builds players picked for Swain vs Sion LoL games, this composite of runes yielded the greatest win rate. Notably, these runes gave a 53.0% winrate overall.
By default, tips, stats, and builds on how to beat Sion as Swain are presented for every ranked division. If you want to scope the stats and builds to a specific division, you can use the selection menu located earlier in the counter matchup guide.