Economy:
- Gold Mining
- Iron Mining
Buildings and Towers:
- Range
- Cost reduction
Citizens and Fishing Boats:
- Cost Reduction
Siege:
- Hit Points
- Range
- Attack
- Fire Rate
Submarines:
- Attack
Civ General:
- Population
EDIT: I made a mistake, so i edit the civ. -cit speed - sub range + siege fire rate + sub attack
I guess now its good