Each of Aphelios' weapons have different strengths, so try to find the right situation for your current weapons.
Be wary of Cassiopeia's damage potential with Twin Fang when she has you poisoned.
Turn away from Cassiopeia when she is casting Petrifying Gaze to get slowed instead of stunned.
The stat comparisons provided here emphasize several valuable Aphelios vs. Cassiopeia matchup statistics that can help us explain the differences and similarities between the two. For instance, Aphelios’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Cassiopeia’s KDA ratio of NaN, highlighting that Aphelios may be more central to his team's team fighting potential than Cassiopeia..
Aphelios usually has a similar longest kill spree as his enemy does. On average, he receives less damage than Cassiopeia. This often reflects differing health capacities; however, it can also indicate that the champion with more HP has less agility and thus is not able to flee from further damage when poked or engaged.
Both LoL champs are great. Both have their strengths, weaknesses, and counters. In the game's current meta, Aphelios usually fairs equally well when taking on Cassiopeia, with a 49.4% win rate. Thus, Aphelios makes an ok counter for Cassiopeia.
While Aphelios does have a lower win rate compared to Cassiopeia, when on opposite teams, Aphelios also has a greater learning curve that makes him a more complex champ to learn and master. You still need to be cautious when picking Aphelios into Cassiopeiaas his relative depth means that you may not be able to unleash his full potential without a lot of practice beforehand.
Moreover, Aphelios also has almost no amount of CC and other utility, a similar amount to Cassiopeia. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there is not a single best champion in League of Legends, in Aphelios vs Cassiopeia matchups, Cassiopeia is the better champion with a similar win rate, similar champion depth, and a similar amount of utility to help out your allies during team fights.
Aphelios is a somewhat poor counter to Cassiopeia. Focus your tactics on increasing your gold income and clearing objectives. If you are able to do that, you should be able to stand on your own as Aphelios against Cassiopeia.
If you would like to truly master Aphelios in order to counter Cassiopeia during both the laning and mid / late game phases of League of Legends, you should continue reading to gather a few extra tricks and insights into this matchup. If you pay attention to the build and tips presented here, you will increase your win rate significantly and be that much closer to League of Legends pro players.
Aphelios usually picks up a similar amount of CS relative to Cassiopeia. Champs who typically don't take much CS often don't require much CS to be effective, such as supports. They are capable of scaling well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually require a lot of items to be effective. In either situation, try to do better than the numbers shown here to do well.
The most important items to have in your Aphelios versus Cassiopeia build consist of Infinity Edge, Lord Dominik's Regards, and Bloodthirster. When Aphelios bought at least these three pieces in his build, he did a lot better vs Cassiopeia than with many other typical item sets. In fact, Aphelios had an average win rate of 49.4% when playing against Cassiopeia with this counter build.
To have the greatest chance of defeating Cassiopeia as Aphelios, you should take the Fleet Footwork, Overheal, Legend: Bloodline, Cut Down, Absolute Focus, and Gathering Storm runes from the Precision and Sorcery rune sets. Of all the runes players chose for Aphelios vs Cassiopeia LoL games, this combination of runes resulted in the greatest win rate. Moreover, these runes gave a 49.4% win rate overall.
By default, tips, stats, and builds on how to beat Cassiopeia as Aphelios are presented for every ranked division. If you would like to scope the stats and builds to a particular player tier, you can use the selection menu located earlier in the counter matchup guide.