I just wanted to chime in I'm glad you guys are going for the "give everyone something brokenly overpowered" approach.
Guilty Gear, a fighting game series, follows this idea, and it is one of the most well balanced fighting games out there.
It's easy to get "mathy" when you give one faction +10% gold and another +10% diplomacy and to figure out which one is better at the end of the day.
Meanwhile, is not getting attacked by wild mobs better than Iron Golems? How do you measure that? It's better off NOT measuring that.