About the ice wall... How tall is it. I have read the FAQ several times, and read forums. Are there are 2 different Ice walls? Please update the FAQ, and keep these things in mind.
The atmosphere goes pretty high up:


So thats means the ice wall would have to be about 400 km + or -. On a map that is really big:

If the ice wall isn't that tall then the atmosphere will blow away as earth accelerates due to the Wizards and their magic (see thread
http://theflatearthsociety.org/forum/index.php?topic=22381.msg456357#msg456357 ):

We know that the ionosphere is up that high because radio signals get bounced off of it every day and night.