Certainly having a fan on the same time as AC cools the room quicker, feels colder also so i usually turn fan off after a short time.
My fans are too powerful, 3 power settings, if i could I'd buy fans with 5. A light breeze at night is ideal. My way round it is moving the fan further away if necessary, I read one person halved the power to the fans which also would work
If it's hot in the room a fan doesn't help much, still hot and humid