Make sure to tag your allies while Sona's auras are active, but avoid getting caught out by enemies.
Save Crescendo for the game-altering moment.
Well-timed uses of Aria of Perseverance will grant you maximum survivability.
Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
The Sona Karthus synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Karthus, compared to her overall stats. Significant differences are areas of focus that highlight how her gameplay changes when paired with this other champion.
Overall, Sona sees a large worsening in her KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA went down from NaN to NaN. This negative change shows that Karthus helps Sona perform worse in ranked League of Legends matches. Yet, the small difference demonstrates that this performance change is only marginal.
When Sona plays on the same team as Karthus, she observes a little drop in her total damage output. This could indicate that Karthus does not support by providing cover for her to deal more damage or that his allyship also helps increase the game's duration. Similarly, when Sona is played alongside Karthus on the same team, he usually scores many fewer killing sprees than when she plays on his own. This is contrasting evidence that she is worse when playing alongside Karthus.
Moreover, when Sona plays with Karthus on the same team, she often receives more damage than when she plays alone. Receiving more damage could mean that Karthus does a poor job of covering Sona during teamfights.
There is no universally accepted best companion for Sona that will 100% of the time be her #1 teammate. However, overall, Karthus is a very bad companion for Sona. By being on the same side as Sona, he lowers their win rate by -5.3% to 45.1%. This clearly indicates that there is a very bad synergy between Sona and Karthus that results in them performing worse together than without each other.
Karthus has a greater difficulty than Sona. That means Sona players must be very careful when arranging Karthus teammates to go into battle on the same side as, as they will need a greater level of skill to play well with you.
Playing cooperatively, Sona players should observe an overall large increase in your team’s capacity to to do a lot of AP damage. When paired, these champs can blast through enemies with magic damage.
Conversely, by pairing Sona and Karthus together, you may not be giving your other allies much engage potential. Plan to include other champs on your team that offsets this relative hole in this pairing's capabilities.
Regardless of your Karthus ally's skill level, you need to focus on increasing your gold income, warding to avoid ambushes, and clearing objectives. If you follow these simple suggestions, you should do well anyway.
If you would like to learn all of the intricacies of Sona in order to pair well with Karthus during both the early game and mid / late game phases of League games, you should keep reading to gather some more tricks and insights into this champion pairing. If you use the build and tips shown above, you will grow your win rate by a lot.
The ideal finished items to have in your Sona and Karthus synergy build include Dream Maker, Moonstone Renewer, and Dawncore. When Sona combined at least these three finished items in her build, she performed significantly better when paired up with Karthus than with most other typical item sets. In fact, Sona had an average win rate of 45.1% helping carry Karthus with this build.
To have the best probability of annihilating your oponents, Sona players should equip the Summon Aery, Manaflow Band, Transcendence, Gathering Storm, Conditioning, and Revitalize runes from the Sorcery and Resolve rune sets. Out of all the runes players picked for this team composition, this combo of runes resulted in the best win rate. In fact, these runes averaged a 45.1% win rate overall.
If you need to see Sona with Karthus collaboration tips and builds for a an individual division, feel free to choose one from the selection menu above. By default, the stats and guides given are computed using all matches run with both champions.