The goods boost from the mountain hall is garbage. The percent it adds is deceptive. If it says 200% bonus, the first 100% is your base production, so it is really only adding 100%. Next, that 100% is added to your relic boost bonus, which mean you are getting 100% extra of your base, not 100% extra of that 700% relic boost. For more random numbers, say your boosted 3-hour production with the max 700% is 4000, which makes your base production before the boost at 500, that actual 100% extra from the MH is giving you only 500 extra goods. And the fewer the normal factories you have out, the more useless it becomes. Building it for pop is okay, but building it for the goods bonus will always be a waste.