I agree with the rain system. My jackson hated being misted but she tolerates the rain system. And have as many real plants as possible. That helps with the humidity and offers your cham places to climb and hide.
Try a variety of feeders. Each cham will have their own preferences. My girl loves dubias, reptiworms, flies of any variety, and butterworms. She is not at all interested in superworms. And crickets only interest her if they're hiding in her plants and she gets to hunt them. She ignores them if they're just hanging out on the screen of her enclosure.
Oh, and if you can give your cham a view of a window he just might love it. My girl's enclosure is right next to a window and she stares out the window half the day. The natural cycle of sunlight also helps with her sleeping cycle. I coordinated her enclosure lights to come on and off with the sunrise and sunset.