I don't have any photos but you can bring them up to the frame via the upper control arms then route them in line with the fuel lines. For extra protection I recommend getting some electrical conduit to put the airline in.
Make sure you leave enough slack for the lines at full bump.
I was thinking that about the front. My biggest concern is the rear due to the amount of junk packed into such a small place. Do you just kinda go over to the control arm and up on top of the frame, to get into the engine bay?
Yes. Only difference is I went along the side of the frame using the lines that are already there as anchor points for the zip ties. There are plenty of lines going into the engine bay. Just use those as a guide and attach your zip ties to them.
Use zip ties to route them alongside the brake lines and fuel line. If those routes are good enough to prevent damage to the brake & fuel lines they're good enough to do the same for your air lines.