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Here is the latest save.
The armor is located behind a tree, hidden there. You can occasionally use the spells Air Vision and Earth Vision; sometimes it helps.)
There shouldn't be any other difficulties.
There is also an unpleasant moment - the 21st month. The map can be completed in a maximum of 7-8 months. After the 20th month, there may be bugs in the game (too many resources), and the turn may freeze, so maybe a simpler map would be better?)