Atlantis Reborn Scenario 2 - Inaccessible sky passage?

While using cheats to look at the map, I noticed a sky passage in the middle of the map pic. The only way to access it is through a gate at the back of the greek base pic. You gain ownership of it if you get LOS. Anyone have ideas of how to make use of this without cheats? I thought of using a Caladria but you can't create your own myth units on this level.