UPDATE: I'm scrapping this idea in favor of a different layout. Mechanic will essentially be the same, but I ended up making this design too tall.

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So once I started calculating which cells were targetable through line of sight from the top of the mountain, I realized that it is WAY too high for this size of a map. Looking down at a 45 degree angle from that high means you can't see anything near the base of the mountain. Going to have to rethink the map completely. I'll probably just make it more of a plateau. Basically a raised flat platform.

This is what the line of sight would look like for half of the top squares on the edge.