Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
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.
The Kassadin Sona synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Sona, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Kassadin sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Sona. His KDA worsened from NaN to NaN. This negative change shows that Sona helps Kassadin perform not as well in ranked League games. Yet, the small difference demonstrates that this performance change is only marginal.
When Kassadin is an ally to Sona, he sees a marginal improvement in his total damage dealt. This could demonstrate that Sona provides protection for him to dish out more damage or that her presence also helps increase the match's duration. Similarly, when Kassadin is played alongside Sona on the same team, he usually scores many fewer killing sprees than when he plays without Sona. This is contrasting evidence that he is worse when playing synergisticly with Sona.
Moreover, when Kassadin plays with Sona on the same team, he on average takes a little less damage than when he fights alone. Getting dealt not as much damage may indicate that Sona does a decent job of covering Kassadin during teamfights.
There is no universally accepted best champion pairing for Kassadin that will 100% of the time be his best ally. Yet, Sona is a very typical ally for Kassadin. By playing on the same side as Kassadin, she drops their win rate by -0.4% to 49.6%. This clearly indicates that there is a weak synergy between Kassadin and Sona that results in them performing worse together than alone.
Sona has a much lower diffuclty than Kassadin. That means Kassadin players don't need to be careful when enlisting Sona teammates to fight alongside, as they will need a much lower level of skill to be able to work well with you.
Fighting on the same side, you will likely see an overall large increase in your team’s ability to deal magical damage. Combined, these two can deal quite a lot of AP type damage.
Although, by pairing Kassadin and Sona together, you may not be providing your other teammates enough tankyness. Plan to include other champions on your team that helps cover this hole in this pairing's potential.
Regardless of your Sona ally's skill level, you need to focus on increasing your income, warding to avoid ambushes, and clearing objectives. If you follow these simple suggestions, you will do well anyway.
To learn all of the intricacies of Kassadin to work well with Sona during both the early game and mid / late game phases of League games, you should continue reading to gather a few extra tips and tricks for this champion pairing. If you use the build and tips presented above, you will increase your win rate by a lot.
The ideal items to have in your Kassadin and Sona synergy build include Seraph's Embrace, Rabadon's Deathcap, and Rod of Ages. When Kassadin bought at least these three items in his build, he did a lot better when fighting alongside Sona than with most other commonly used item sets. In fact, Kassadin had an average winrate of 49.6% when playing alongside Sona with this build.
To have the best likelihood of defeating your oponents, you should use the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Of all the runes players picked for Kassadin and Sona pairings, this composite of runes yielded the best win rate. In fact, these runes gave a 49.6% winrate overall.
If you want to see Kassadin with Sona cooperations tips and stats for a a particular skill level, please choose one from the selection menu displayed above. At first, the statistics and guides displayed are calculated using all matches run with both champs.