I did a new test, and compared 2 saves of AD 1500
If it holds true that:
AI growth% Sci % Prod %
slave settler 160 60 160
serf chieftain 130 75 130
vassal warlord 110 90 110
baron noble 100 100 100
count prince 95 110 95
duke monarch 90 115 90
prince emperor 85 120 85
king immortal 80 125 80
emperor deity 60 130 60
Then I suggest the following handicaps:
China Emperor
India Emperor
Egypt Serf
Japan Prince
Mongolia Slave
Greece Duke
Rome Baron
Persia Baron
Germany Prince
France Slave
England Slave
Spain Slave
Russia Serf
Arabia Serf
Mali Slave
Aztec Slave
If it holds true that:
AI growth% Sci % Prod %
slave settler 160 60 160
serf chieftain 130 75 130
vassal warlord 110 90 110
baron noble 100 100 100
count prince 95 110 95
duke monarch 90 115 90
prince emperor 85 120 85
king immortal 80 125 80
emperor deity 60 130 60
Then I suggest the following handicaps:
China Emperor
India Emperor
Egypt Serf
Japan Prince
Mongolia Slave
Greece Duke
Rome Baron
Persia Baron
Germany Prince
France Slave
England Slave
Spain Slave
Russia Serf
Arabia Serf
Mali Slave
Aztec Slave