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.
Teemo's mushrooms can be used to farm creep waves very effectively.
Place your mushrooms at key locations on the map, such as by the Dragon or Baron Nashor, to reveal when your enemies might be attempting to kill them.
The Kassadin Teemo synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Teemo, 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 very large drop in his KDA (ratio of kills and assists to deaths) when paired with Teemo. His KDA went down from NaN to NaN. This drop shows that Teemo helps Kassadin perform poorer in competitive League of Legends rounds. Yet, the small difference shows that this performance change is only marginal.
When Kassadin tries to synergize with Teemo, he sees a little increase in his total damage dealt. This change could signal that Teemo supports by providing cover for him to deal more damage or that his participation also helps extend the match's duration. Similarly, when Kassadin is played alongside Teemo on the same team, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing with Teemo.
Moreover, when Kassadin plays with Teemo on the same team, he typically receives more damage than when he fights alone. Receiving more damage may mean that Teemo does a poor job of covering Kassadin during team fights.
There is no top companion for Kassadin that will 100% of the time be his #1 synergy. However, Teemo is a pretty good teammate for Kassadin. By locking into the same side as Kassadin, he raises their win rate by 1.9% to 51.9%. This signals that there is a somewhat important synergy between Kassadin and Teemo that results in them performing stronger together than alone.
Teemo has a lower difficulty than Kassadin. That means you don't need to be very careful when finding Teemo comrades to fight alongside, as they will need a lower level of skill to cooperate well with you.
Fighting together, you should expect to see an overall large increase in your team’s ability to to do a lot of AP damage. Together, these champs can deal quite a lot of AP type damage.
In contrast, by bringing Kassadin and Teemo together, you probably will not be providing your other allies very much AD. Make sure to have other champs on your team that nullifies this gap in this pairing's abilities.
Regardless of your Teemo ally's skill level, you need to focus on increasing your gold income, staying alive by avoiding foolish fights, and taking down objectives. If you follow these simple suggestions, you will do well, regardless.
To truly master Kassadin in order to synergize with Teemo during both the early game and mid / late game phases of League, you should keep reading to master a few extra tips and tricks for this champion pairing. If you listen to the build and suggestions shown above, you should grow your win rate significantly.
The most crucial items to get in your Kassadin and Teemo synergy build include Rabadon's Deathcap, Malignance, and Rod of Ages. When Kassadin combined at least these three items in his build, he did significantly better as an ally of Teemo than with most other common builds. In fact, Kassadin had an average win rate of 51.9% when synergizing his build and playstyle to Teemo with this build.
To have the best chance of coming out on top against your oponents, Kassadin players should equip 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 rune combinations we have analyed for this team composition, this sequence of runes resulted in the best win rate. In fact, these runes gave a 51.9% winrate overall.
By default, tips, stats, and builds on how to pair Teemo with Kassadin are given for all skill levels, merged. If you want to filter the stats and builds to a particular rank, you may use the selection menu earlier in the counter matchup guide.