The map is very cool conceptually, but as I found out, there are some guidelines to follow with MG maps so that they'll be playable.
1. Stone. Egypt uses a lot of stone: And because you don't know which players would be playing Egypt, you have to give the same amount of stone to each player.
Filux, one of the developers, suggested a ratio of 4 stone to 5 gold.
2. map objects and resources: The more placed on the map, the more CPU and memory is used.
3. Pathfinding: Just because there is room for the AI units to move, that doesn't mean they won't get stuck.
I made a derivative of the map above. The dropbox link is https://www.dropbox.com/s/xxi5qbf4ek1j6bj/hill_in_the_front_A2.mgm?dl=0
and here are 2 screenshots: