
With his potent single-target damage and significant healing, Ekko proves to be a formidable force at the moment. Therefore, in the upcoming 13.13 patch, Riot will reduce Ekko's healing ability from 30% to 20% of the damage taken.

This change promises to make Ekko more vulnerable rather than having him possess overly resilient capabilities as he does now. It also poses significant challenges for Ekko's frontline playstyle during mid-game, where he can be swiftly eliminated by other reroll compositions like Zed, Darius.
Zeri and the Gang
In patch 13.13, Riot has made a significant change regarding Zeri's power. Specifically, this champion will no longer refresh the duration of their skills upon defeating an enemy champion. Instead, the duration of the abilities will increase by 1 second, but the damage of the lightning beam at 1 and 2 stars will be reduced.

This adjustment significantly reduces Zeri's continuous ability to finish off opponents in the late game. Consequently, the Zeri - Sniper lineup appears considerably weaker in the upcoming patch. This lineup might even risk falling out of the group of the strongest compositions in the future.
Conclusion
In various ways, Yordle compositions, Ekko carry, Zeri and the Gang all experience significant power reductions in patch 13.13. Perhaps Teamfight Tactics players should refrain from using these compositions for climbing the ranks in the near future.