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Unfortunately, this is just an attempt to fit the practice to the theory.
1. As I understand the essence of this mini-nostalgia: the main motive is to capture the strategic center, and then play according to the situation. That is, first we clear our treasure locations until we gather enough strength to go to the center, and then we head there. Considering this, specifically in this mini-nostalgia, having a ranged unit that can jump to the opponent's treasure location will hardly be a disadvantage, regardless of the opponent's skill.
2. It is also quite possible that the opponent divided their army. One part clears the treasure locations, and the other, say, the center, or another treasure location. I wouldn't say that this is an unlikely scenario.
3. In fact, you can find an additional motive. The fact is that from the underground, it is highly likely that you can use a ranged unit to attack the center.
4. Moving through rough terrain cannot be a very bad move in any case. Well, maybe it's not a utopia, but a couple of uncleaned lairs might be there. Considering that roads are the slowest, moving through rough terrain is definitely a promising option.