After nearly a week of mostly leaving it running while at work i have all* upgrades.
Past 60somthing I never seemed to have enough AA but finally got over the mithrill shortage.
Cheapest unit i can get (Demo) costs 5.3M
Next Runesmith is 14.1M, laser is
16.2M, turret is 21.1M and bulldozer is 16.3M.
(I have no luck enchantments on the cannon since its 7.9M but all other enchantments are maxed.)
Most annoying thing is currently the mountain vacuums up about 1/5th to 1/4th of the treasure before it even touches the ground.