Lead your enemy when targeting with Noxious Blast to ensure the hit.
Use Twin Fang on poisoned stationary targets like monsters and units stunned by her Petrifying Gaze for maximum damage.
Communication is key when making use of Thresh's lantern. Let your teammates know how you like to use it.
Death Sentence and Flay can be combined in either cast order for powerful combinations.
Thresh can collect souls without needing to kill units himself. Planning your map position to be near the most deaths will help to maximize soul collection.
The Cassiopeia Thresh synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Thresh, compared to her overall stats. Significant differences are areas of focus that highlight how her gameplay changes when paired with this other champion.
Overall, Cassiopeia sees a large worsening in her KDA (ratio of kills and assists to deaths) when paired with Thresh. His KDA went down from NaN to NaN. This drop shows that Thresh helps Cassiopeia perform worse in ranked League matches. Yet, the small difference demonstrates that this performance change is not very impactful.
When Cassiopeia is paired with Thresh, she gets a barely noticable drop in her full damage dealt. This change may indicate that Thresh does not provide protection for her to dish out more damage or that his presence also helps increase the match's duration. Similarly, when Cassiopeia is played alongside Thresh on the same side, he usually scores many fewer killing sprees than when she plays without Thresh. This is contrasting evidence that she is worse when playing with Thresh.
Additionally, when Cassiopeia plays with Thresh on the same side, she usually takes a little less damage than when she fights alone. Taking not as much damage could indicate that Thresh does a decent job of protecting Cassiopeia during team fights.
There is no perfect companion for Cassiopeia that will no matter what be her ideal ally. However, Thresh is a not very good companion for Cassiopeia. By locking into the same team as Cassiopeia, he drops their win rate by -2.3% to 48.0%. This clearly indicates that there is a bad strategic relationship between Cassiopeia and Thresh that allows them to perform worse together than without each other.
Thresh has a much lower diffuclty than Cassiopeia. That means Cassiopeia players don't need to be very careful when finding Thresh teammates to go into battle on the same side as, as they will require a much lower level of skill to do well with you.
When playing cooperatively, you will likely observe an overall large increase in your team’s capacity to deal magic damage. Together, these champions can deal quite a lot of AP type damage.
Conversely, by pairing Cassiopeia and Thresh together, you may not be granting your other teammates a great deal of sustained damage output. Plan to include other champs on your team that offsets this relative hole in their potential.
Regardless of the ability of your Thresh ally, you should focus on maximizing your income, warding to avoid ambushes, and clearing objectives. If you follow these simple suggestions, you will do well anyway.
To truly master Cassiopeia to synergize with Thresh during both the early game and mid / late game phases of LoL, you should keep reading to learn some more lessons on this champion pairing. If you pay attention to the build and stats displayed above, you will increase your win rate significantly.
The most important finished items to prioritize in your Cassiopeia and Thresh synergy build consist of Seraph's Embrace, Rylai's Crystal Scepter, and Cosmic Drive. When Cassiopeia included at least these three finished items in her build, she did much better when fighting alongside Thresh than with most other common item sets. In fact, Cassiopeia boasted an average win rate of 48.0% when synergizing her build and playstyle to Thresh with this build.
To have the highest chance of defeating your oponents, you should use the Conqueror, Presence of Mind, Legend: Tenacity, Last Stand, Manaflow Band, and Transcendence runes from the Precision and Sorcery rune sets. Out of all the rune combinations players chose for Cassiopeia and Thresh pairings, this combo of runes resulted in the highest win rate. Moreover, these runes provided a 48.0% win rate overall.
If you want to see Cassiopeia with Thresh synergy tips and builds for a a particular skill level, feel free to choose one from the selection menu provided above. If viewing for the first time, the statistics and tips and suggestions shown are calculated using all games with data with both champs.