UrSafot
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Regarding clickability, configuring it is cumbersome and poorly implemented, which is why it was removed, except for trading artifacts to display the bonus. As for the building tree, I have no idea how to improve it; the timing for building branches is already balanced against similar structures in other factions. The cost seems to be fine as well. But if you have specific suggestions, I'm always open to them, along the lines of "these tiers should be here, these connections should be made, and this will result in this, so it would be better."