The main reason for the max_patches error were the leaks.
You should realy learn how to avoid this overlapped brushes. It makes me sad to see those weird and horrible mapfiles.
Renamed the mapfile to beta, fixed the leak, and some other small things, but I didn't fix the bad brushwork, because it would be easier to remake this map than fixing all brushes...
The fastvis export works fine now, but I won't get the time to test the final compile. Maybe it works fine too or you have to scale up some visible textures. Just test it and post here if you have problems.
Also the base was not siege. A siege base should be
between the offensive and the deffensive team. And why did you use a func_water entity? Don't know if it works in this game, but it's useless in your map, so I revert it to the world
Btw, i am not interested to continue the map