At the end of July, the last upgrade on the Boom Mines, which were the last thing left, finished. And now everything that can be done in the Armory, including the Boom Mines are maxed. Now I no longer have Gold upgrades to do so I can freely dumb it on Tribes and Submarine explorations.
On my way to upgrade my defenses. The only ones that I have maxed so far are 1 Mortar, 1 Cannon, 1 Boom Cannon, 2 Rocket Launchers and 2 Shock Launchers. More are coming every now and then. Perhaps by the end of the year, I will have finally finished them.