I have cleared everything up to the Isles after Drrakha and am constantly doing up to Lvl 12-15 in both Strongholds, BI, and the Raiding Brigands within minutes of them showing up usually. I never ever have close to enough gold, sometimes barely enough to purchase the Merchant wares that cycle. Yeah, I have items/upgrades to upgrade units, but no gold to do so. Screw the entire idea of using the forge. I have to ask, is this by design so we purchase it for cash? Or am I simply missing something else obvious?