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.
The Yuumi Kassadin synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Kassadin, compared to her overall stats. Significant differences are areas of focus that highlight how her gameplay changes when paired with this other champion.
Overall, Yuumi sees a large worsening in her KDA (ratio of kills and assists to deaths) when paired with Kassadin. His KDA fell from NaN to NaN. This fall shows that Kassadin helps Yuumi perform not as well in ranked League games. Yet, the small difference demonstrates that this performance change is only marginal.
When Yuumi plays on the same team as Kassadin, she observes a barely noticable drop in her full damage dealt. This difference may signal that Kassadin doesn't help protection for her to deal more damage or that his participation also helps increase the match's duration. Similarly, when Yuumi is played together with Kassadin on the same side, he usually scores many fewer killing sprees than when she plays alone. This is contrasting evidence that she is worse when playing alongside Kassadin.
Additionally, when Yuumi plays with Kassadin on the same team, she typically receives a little less damage than when she fights alone. Receiving not as much damage may mean that Kassadin does a decent job of protecting Yuumi in team fights.
There is no ideal ally for Yuumi that will no matter what be her best teammate. However, overall, Kassadin is a good teammate for Yuumi. By locking into the same team as Yuumi, he improves their win rate by 2.7% to 46.6%. This proves that there is a somewhat important bond between Yuumi and Kassadin that results in them performing at the top of their game together than alone.
Kassadin has a much greater difficulty compared to Yuumi. That means Yuumi players need to be cautious when enlisting Kassadin allies to play with, as they will need a much greater level of skill to cooperate well with you.
Fighting alongside, you will likely witness an overall large increase in your team’s capacity to deal magic damage. When paired, these champs are able to dish out a surprising amount of magic type damage.
Conversely, by pairing Yuumi and Kassadin together, you may not be granting your other teammates a great deal of cover. Make sure to include other champs on your team that fills this relative gap in their playstyle.
Regardless of your Kassadin ally's ability, you need to focus on maximizing your gold income, warding to avoid ambushes, and taking down objectives. If you follow these simple suggestions, you will do well, regardless.
If you would like to truly master Yuumi in order to synergize with Kassadin during both the laning and mid / late game phases of League rounds, you should continue reading to master a few extra lessons on this champion pairing. If you pay attention to the build and tips shown above, you will grow your win rate significantly.
The ideal items to build first in your Yuumi and Kassadin synergy build consist of Mikael's Blessing, Dream Maker, and Staff of Flowing Water. When Yuumi combined at least these three items in her build, she performed significantly better when fighting alongside Kassadin than with many other typical builds. In fact, Yuumi boasted an average winrate of 46.6% helping carry Kassadin with this build.
To have the greatest chance of annihilating your oponents, you should take the Summon Aery, Manaflow Band, Transcendence, Scorch, Font of Life, and Revitalize runes from the Sorcery and Resolve rune sets. Out of all the rune sets players picked for this champion pairing, this sequence of runes yielded the greatest win rate. In fact, these runes provided a 46.6% winrate overall.
By default, tips, stats, and builds on how to team up Kassadin with Yuumi are presented for all ranked divisions. If you want to filter the statistics and builds to a distinct skill level, you should use the selection menu located earlier on the page.