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 Kassadin Renata Glasc synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Renata Glasc, 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 Renata Glasc. His KDA decreased from NaN to NaN. This fall shows that Renata Glasc helps Kassadin perform not as well in competitive League of Legends rounds. Yet, the small difference shows that this performance change is only marginal.
When Kassadin is an ally to Renata Glasc, he gets a small increase in his total damage dealt. This may indicate that Renata Glasc helps provide cover for him to deal more damage or that their presence on the team also helps increase the game's duration. Similarly, when Kassadin is played alongside Renata Glasc on the same side, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing synergisticly with Renata Glasc.
Additionally, when Kassadin plays with Renata Glasc on the same side, he often takes a little more damage than when he fights alone. Receiving more damage could mean that Renata Glasc does a poor job of protecting Kassadin during team fights.
There is no one best ally for Kassadin that will no matter what be his best synergy. However, overall, Renata Glasc is a not very good teammate for Kassadin. By being on the same side as Kassadin, they drops their win rate by -1.1% to 48.9%. This demonstrates that there is a bad bond between Kassadin and Renata Glasc that results in them performing worse together than alone.
Renata Glasc has a lower difficulty than Kassadin. That means you don't need to be cautious when arranging Renata Glasc allies to go into battle on the same side as, as they will have to have a relatively low level of skill to be able to cooperate well with you.
When playing alongside, you should see an overall large increase in your team’s capacity to deal magical damage. When paired, these champs can deal quite a lot of AP type damage.
Although, by grouping Kassadin and Renata Glasc together, you probably will not be giving your side much sustained damage output. Plan to have other champions on your team that fills this gap in their abilities.
Regardless of your Renata Glasc ally's skill level, you need to focus on increasing your income, staying alive by avoiding foolish fights, and taking down objectives. If you heed this simple advice, you will do well, regardless.
To truly master Kassadin to pair well with Renata Glasc during both the lane and mid / late game phases of League, you should keep reading to learn additional tricks and insights into this champion pairing. If you listen to the build and suggestions shown here, you will grow your win rate significantly.
The top finished items to prioritize in your Kassadin and Renata Glasc synergy build consist of Seraph's Embrace, Zhonya's Hourglass, and Rod of Ages. When Kassadin included at least these three finished items in his build, he performed significantly better when fighting alongside Renata Glasc than with many other commonly used builds. In fact, Kassadin had an average winrate of 48.9% helping carry Renata Glasc with this build.
To have the greatest probability of crushing your oponents, you should take the Fleet Footwork, Presence of Mind, Legend: Tenacity, Coup de Grace, Overgrowth, and Second Wind runes from the Precision and Resolve rune sets. Of all the rune sets players chose for Kassadin and Renata Glasc pairings, this sequence of runes resulted in the greatest win rate. Moreover, these runes averaged a 48.9% win rate overall.
By default, tips, statistics, and builds on how to synergize Renata Glasc with Kassadin are presented for all skill levels combined. If you want to narrow the statistics and builds to a particular rank, you should use the selection menu located earlier in the counter matchup guide.