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This map is very challenging for me((( I started it a million times more than a year ago and just kept failing(( In the end, I gave up and set the difficulty to Veteran, and I completed it in 6 months and 1 week. Basically, it's bearable on Veteran. There are difficult battles at the beginning, but then it becomes easier. I played in the standard way, using Haven and Dungeon.
The map is amazing!