Much of the setup and care is good but there are a few things that need to be changed in order to help your cham stay healthy.
Just as people require a variety of foods to be healthy, your chameleon needs a variety of feeder insects to stay healthy.
In addition to crickets, dubias, silkworms, hornworms, phoenixworms and blue bottle flies are good.
Mealworms are not one of the better feeders to use.
This place carries a nice variety of feeders.
It is also important to feed your feeder insects nutritious food because they are what your cham gets his nutrition from.
Here is a very good writeup about these 2 things by a vet and cham keeper:
https://www.chameleonforums.com/blogs/ferretinmyshoes/560-frequently-asked-questions-nutrition.html
To help make up for the lack of calcium of many feeders, dusting the feeders is necessary.
I don't believe that the calcium spray has enough calcium to be relied on--and I believe the same is true of the vitamin spray.
The successful longterm cham keepers rely on good gutloading and light daily dusting of feeders.
It is important that the daily dusting not have D3 in it because too much D3 can damage internal organs permanently.
A good schedule for a Panther is typically
Calcium without d3 every feeding like this one
http://www.joshsfrogs.com/food-nutr...s/rep-cal/rep-cal-calcium-without-vit-d3.html
Calcium with d3 twice a month like this
http://www.pangeareptile.com/store/rep-cal-ultrafine-calcium-with-d3.html
A multivitamin twice a month like this one
http://www.joshsfrogs.com/food-nutr...nhancers/rep-cal/herptivite-multivitamin.html
I'm concerned that the cage may be too damp, so that molds or bacteria can grow. This is known to lead to respiratory infections.
The cage and its furnishings should dry out in between mistings.
The reptifogger might be OK to use if it cycles on and off but I don't believe it should run constantly throughout the day.
Too often stores sell people substrates to use on the bottom of the cage but they are a bad idea for chams. If you have a substrate, please remove it.
Chams can become impacted (intestines blocked) or the substrate grows bacteria or mold and makes the cham sick with a respiratory infection.
It doesn't matter to the cham if the plants are real or fake but he needs plenty of hiding places to feel secure and not stressed. Stress causes chams to get sick more easily.
You'll also want to find a good reptile-knowledgeable vet before you absolutely need one.
The fecal tests that people mention are done to be sure that your cham does not have any internal parasites which can lead to serious health problems or even death. To get fecal tests done, you bring a fresh poop sample to the vet.