There's some option to know how many gold we earn/min? If not would be nice have it!
Go to your profile.
(Account -> View profile)
Aight 3.1 xD
What do you think i should make next upgrade? I've:
Workers:3
Minecarts:1
Pickaxe:9
Equipment:1
Chambers:2
Goldores:1
Depends, do you have a lot of time to claim manually? If yes, save up for a gold ore or more workers.
If you don't have that much time to claim, then put your gold into chambers.
Or at least, that is how I did it. But eventually I started to invest in chambers as well because I didn't had that much time anymore to keep claiming manually.
I do not know if this is the best strategy, but I just did what feels right for me.
I upgraded mixed Chambers and Equipments, this gives a good advantage when you have a gap between claims of 2 hours. The maximum possible is 3 hours and something I think, but it's too expensive and worthless to upgrade it to the maximum at once.
Just need to check between each upgrade what is more useful, chamber or equipment (by the price).