Note: after viewing other videos about Fantasy General, I see I am wrong to say that ambushes are useless and difficult. It's actually a matter of having a bait that you show the enemy and a concealed ambush unit next to it, that strikes when they attack the bait. This is terrific, as the ambushing unit gets to attack without the enemy fighting back. You can add a supporting slinger unit or even a second ambusher and it is possible to wipe out enemy units this way without any loss to yourself. You have to put the bait where the enemy can see it, and you have to have the right terrain to hide the ambushers and units that have the ambush ability, so it still isn't always easy to arrange, but you should definitely try to arrange ambushes wherever possible.
Thank you for the path selection demonstration and the explanation of ambush
Note: after viewing other videos about Fantasy General, I see I am wrong to say that ambushes are useless and difficult. It's actually a matter of having a bait that you show the enemy and a concealed ambush unit next to it, that strikes when they attack the bait. This is terrific, as the ambushing unit gets to attack without the enemy fighting back. You can add a supporting slinger unit or even a second ambusher and it is possible to wipe out enemy units this way without any loss to yourself. You have to put the bait where the enemy can see it, and you have to have the right terrain to hide the ambushers and units that have the ambush ability, so it still isn't always easy to arrange, but you should definitely try to arrange ambushes wherever possible.