I've read about people feeding mantis to their cham. Recommended to go with smaller size rather than an adult female. This way the cham can capture at least half of the mantis body in its mouth and avoid the spikes on the its forearms. Freshly molted mantis is better, that's if you beed them.
Hi Greyson, air circulation in an aquarium is a challenge. One thing you can try is cover the middle of the top say a little over a third of the length. Place a small usb fan on one end so it draws air out. This will help in theory draw air into the enclosure from the other side. A Brookesia...