Efficiency, but the other way around
Found the efficiency, but the other way around, the lower the figures r, the better. it basically gives you the value you r getting for your food spent:
Works=.02935
Warrs=.045
Scouts=.06935
Pikes=.06172
Swords=.0685
Arcs=.073115
Cavs=.08746
Phracts=.10454
Transees=.08001
Blsts=.1209
BatRams=.13502
C-pults=.16296
As you can see, workers r the most efficient and catapults r not.
HOWEVER, you also need to know why the efficiency is low(then the number is actually high. for example warriors have high efc since they take only 3 food and hv 50 atk, but archers take 9 food but they hv a much more useful ability; range. this applies for all other units. try this out.