Peng Qi
Emperor
We just need an upgrade path for Chariots, Scouts, and a final upgrade for Machine Guns and we've got complete paths. I really hope Firaxis does this. Here are my suggestions for the two more complicated upgrade paths:
Chariot (The Wheel); 6, 10
Skirmisher (Engineering); 8, 11; loses rough terrain penalty.
Mounted Crossbowman (Printing Press); 15, 16; Keshik and Camel Archer replace this.
Fusilier (Metallurgy); 20, 26
Assault Gun (Combined Arms); 40, 50; retain 2 range, unlike Gattling/MG. Bonuses vs tanks also apply against Assault Guns
Harrier Jet (Advanced Ballistics); 6o, 6o; suffers same combat penalties Helicopter Gunship suffers.
Scout (Agriculture); 5
Explorer (Optics); 7
Pioneer (Astronomy): 12
Raider (Archaeology): 18
Guerrilla (Refrigeration): 24
Scout Sniper (Telecommunications): 40
Chariot (The Wheel); 6, 10
Skirmisher (Engineering); 8, 11; loses rough terrain penalty.
Mounted Crossbowman (Printing Press); 15, 16; Keshik and Camel Archer replace this.
Fusilier (Metallurgy); 20, 26
Assault Gun (Combined Arms); 40, 50; retain 2 range, unlike Gattling/MG. Bonuses vs tanks also apply against Assault Guns
Harrier Jet (Advanced Ballistics); 6o, 6o; suffers same combat penalties Helicopter Gunship suffers.
Scout (Agriculture); 5
Explorer (Optics); 7
Pioneer (Astronomy): 12
Raider (Archaeology): 18
Guerrilla (Refrigeration): 24
Scout Sniper (Telecommunications): 40