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I run my copper ores at level 2 all of the time now, and even level 3 if my buffing partner is around to buff them with baskets. (Level 42). It makes perfect sense. Only 50 tools per mine to upgrade to level 2, takes 2 min 30 sec.
Pausing a toolsmith or bronze weaponsmith would also help.
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Buy the unlimited cooper mine and level it to 5. Buff it daily. :-)
Problem solved. Put a storage next to them.
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Get your geologist upgraded with "Quality copper shaft" skill. He will find twice faster vains where extraction time is cut to 1min 30sec. This way it will be like having 12 copper mines instead of 6. For some reason the geologist is always finding them even on the lowest skill level of 15%. So you just need to make 6 manuscripts to double you copper production.
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Wouldn't demolishing your finesmith and either rebuilding just to level 1 or buying the resources be another option?
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Take all 6 mines to level 2 and have a friend basket buff, problem solved.
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I upgrade all copper mines to level 3 and put a Basket on each of them. The ore will go to 20.000 in no-time.