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I suggest making the central treasure forcibly underground lava, so both players will have 2 gold mines. The element of uncertainty will remain, of course, but this will clearly make the distribution more even. Making a guaranteed land passage seems unrealistic.
It is impossible to track such things at the level of the random number generator, and if you restart each secondary resource block, a lot of time will be spent on restarts. I suggest making the respawn areas slightly larger by moving the central treasure and the secondary dungeon underground, which will reduce the chance of a block.
It will be interesting to play on such a template.
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