Goal based Events (like : Goemon's Gold) provide Gold \Food at their 2nd and 4th step . These Gold and Food are quite useless for advanced level player .
So instead provide Oils shipments or museum goods . Add the rewards to Inventory so that they are useful for even Gunpowder or lower level players , whey they come to higher level .
So instead provide Oils shipments or museum goods . Add the rewards to Inventory so that they are useful for even Gunpowder or lower level players , whey they come to higher level .