Credit to John John John for the spreadsheet: https://docs.google.com/spreadsheets/d/16u38JkN7wUeCmegxshjSt6oCCfYTR–zZerKNDIZq6k/edit?gid=0#gid=0
You can replace darmanitan with blaziken.
Some examples of Pokemon for Turn 4 Flamethrower/Overheat are Moltres, Chandelure, Charizard, etc.
You can breed a purposely slow chandelure, rotom, torkoal, etc for use during Trick Room, or use items such as Iron ball and Room service.
eject button ninetales is viable?