The latest balance patches were mostly concerned with unbalanced units, leaving general civilization imbalances aside. But nowadays it's clear how impactful good eco bonuses are and players realized that civilizations without eco bonuses are simply not competetive. To fix this issue one would normally just nerf all eco bonuses, but with the the introduction of the no-house bonus for the huns and the free wood upgrades for the burmese we have two excellent bonuses which cannot be nerfed. Therefore I suggest to rather buff all the weaker civilisations - to bring them up to date.
Here would be one way to try to improve the current AoE 2 Balance:
Britons:
Shepherds work 25% faster
--> Shepherds work 33% faster
Byzantines:
Town Watch is free
--> Town Watch and Town Patrol are free
Advance to Imperial Age costs -33%
--> Advance to Imperial Age costs -50%
Celts:
Lumberjacks work 15% faster
--> Lumberjacks work 18% faster
Chinese:
Technologies cost -10/15/20% in Feudal/Castle/Imperial Age
--> Technologies cost -15/20/25% in Feudal/Castle/Imperial Age
Franks:
Foragers work 25% faster
--> Foragers work 33% faster
Goths:
Infantry cost -35% starting in Feudal Age
--> Infantry cost -35% starting in Dark Age
Japanese:
Infantry attack 33% faster starting in Feudal Age
--> Infantry attack 33% faster starting in Dark Age
Khmer:
Battle Elephants +15% faster
--> Stable units +15% faster
Persians:
Town Center work rate +10/15/20% in Feudal/Castle/Imperial Age
--> Town Center work rate +10/15/20/25% in Dark/Feudal/Castle/Imperial Age
Portuguese:
All units cost -15% gold
--> All units cost -33% gold
Saracens:
Market costs -75 wood
--> Market and Blacksmith cost -75 wood
--> Start with +100 stone
Teutons:
Farms cost -33%
--> Farms cost -50%
Turks:
Gold miners work 20% faster
--> Gold miners work 33% faster
Vietnamese:
Archery Range units +10/15/20% HP in Feudal/Castle/Imperial Age
--> Archery Range units +15/20/25% HP in Feudal/Castle/Imperial Age
Vikings:
Infantry +10/15/20% HP in Feudal/Castle/Imperial Age
--> Infantry +10/15/20/25% HP in Dark/Feudal/Castle/Imperial Age
Here would be one way to try to improve the current AoE 2 Balance:
Britons:
Shepherds work 25% faster
--> Shepherds work 33% faster
Byzantines:
Town Watch is free
--> Town Watch and Town Patrol are free
Advance to Imperial Age costs -33%
--> Advance to Imperial Age costs -50%
Celts:
Lumberjacks work 15% faster
--> Lumberjacks work 18% faster
Chinese:
Technologies cost -10/15/20% in Feudal/Castle/Imperial Age
--> Technologies cost -15/20/25% in Feudal/Castle/Imperial Age
Franks:
Foragers work 25% faster
--> Foragers work 33% faster
Goths:
Infantry cost -35% starting in Feudal Age
--> Infantry cost -35% starting in Dark Age
Japanese:
Infantry attack 33% faster starting in Feudal Age
--> Infantry attack 33% faster starting in Dark Age
Khmer:
Battle Elephants +15% faster
--> Stable units +15% faster
Persians:
Town Center work rate +10/15/20% in Feudal/Castle/Imperial Age
--> Town Center work rate +10/15/20/25% in Dark/Feudal/Castle/Imperial Age
Portuguese:
All units cost -15% gold
--> All units cost -33% gold
Saracens:
Market costs -75 wood
--> Market and Blacksmith cost -75 wood
--> Start with +100 stone
Teutons:
Farms cost -33%
--> Farms cost -50%
Turks:
Gold miners work 20% faster
--> Gold miners work 33% faster
Vietnamese:
Archery Range units +10/15/20% HP in Feudal/Castle/Imperial Age
--> Archery Range units +15/20/25% HP in Feudal/Castle/Imperial Age
Vikings:
Infantry +10/15/20% HP in Feudal/Castle/Imperial Age
--> Infantry +10/15/20/25% HP in Dark/Feudal/Castle/Imperial Age