It makes sense to adjust your strategy on the mirror map depending on your opponent. For example, if you are certain that they won't rush to the 121 location, you don't need to rush there either.

I remember, in the final of the Bay Cup against GoD on the mirror map, I decided not to rush to 117 for the Castle in the dragon's lair (second dungeon), arguing that GoD definitely wouldn't rush there either, so there's no point in me losing.

But, for example, against Samurai, I would rush without hesitation, because he will definitely rush, which means I need to rush too, and if it turns out that neither of us can take it, then we will both lose, but Samurai will be the one to give up. :)

After the game, it turned out that the lair, although difficult, could be taken, and that GoD actually didn't rush there.