I don’t think you’d see any additional benefit at all because dehumidifiers and air conditioners use the same underlying principle: cold air cannot hold as much moisture as warm air. Air conditioners and dehumidifiers both use a refrigerant to cool the air, forcing it to precipitate moisture out. Since your house air conditioner is already doing that, the dehumidifiers would be superfluous.
Both processes generate net heat. The main difference between the two is that the air conditioner vents the heat (and the moisture) to the outside, whereas the dehumidifier just dumps the heat into the room and collects the water into a bucket.
