Wynaut's best moveset in Pokémon GO is Counter and Mirror Coat, with 3.48 damage per second, and it can deal 56.3 damage before Wynaut faints. This is true when battling in neutral weather.
All Wynaut movesets ranked
Here is a complete list of Wynaut movesets in Pokémon GO, ranked by their DPS and TDO. You can change the weather and the opposing Pokémon.