The Red Cat Gambit is the sixth and final stage in Coup de Chat.
Simple stage, Rodeo with anti-relic talent, meatshields and Slapstick is all you need.
Alternatively, it is possible to use units such as Sniper the Heavy, Kubiluga or Ultralan to stunlock the enemies close to the base while some LD Ubers slowly destroy it.
Strategy 1 (Cheese, No gacha)
Lineup: Gross Cat, Crazed Gross Cat, Creepmallow, Cat O'Lantern, (Freeze Up SM+M) Healer CC, and Little Leaguer Cat. (None of the levels matter)
Cat Cannon: Breakerblast
Battle: Let Othom hit the base, and send out Healer to perma-freeze it. Stack Little Leaguers, and time Breakerblast so that it doesn't interrupt Healer's attack. Video link to strategy: