I would just cover most of the mesh top with acrylic or alum foil for humidity. The lamps can kill humidity more than an under tank heater would. I could be wrong, but a mister setup may be overkill. I use tubs for my bp's, so humidity just happens. I have had success using foil over the top. You can just cut out the spaces for the lamps. There will always be a debate over feeding in or out of cage, but as long as he eats well I don't think it really matters (IMO). Congrats on the new bp!