I don't own a misting system, I mist with a spray bottle and haven't had issues. My veiled chams I've had for quite a few years and I've never had a problem with manual hand misting yet. And yes you should get a screen enclosure, the sooner the better.
I see a lump/bulge on the top of the tail, which looks irregular to me, but I still do not see a hemipenal bulge on the bottom side near the vent. I still stick to my original assessment of your panther being female.
I probably should have explained what I was looking for better. I need more of a side profile shot, but from everything I have seen I do not see a hemipenal bulge. Here is a picture of my juvenile male, you can see a bulge in the base of the tail right after the vent.
You are definitely going to need to post more info than what you've provided so far. You could start with checking this link and filling out the info. http://www.chameleonforums.com/threads/how-to-ask-for-help.66/.
So Rick did a complete shed today and is getting more color. Here are pictures of the day I got him vs today. These two pictures are taken exactly one month apart.
What type of uvb light are you using? It appears his casque has been burned in the past or is currently being burned, I am not an expert on health issues though. His eyes also look sunken to me which would indicate dehydration.