Example…
A 169M line gives roughly 13M gold.
Each of the enemies usually has 169/5 = 33.8M Power.
So if I hire a mercenary that has 33.8M Power…
They should cost square root of (33.8*5) divided by 5.
Square root of 169 is 13.
13 / 5 = 2.6.
So that mercenary should cost 2.6 Million Gold.
Now it’d cost 16.9 Million Gold (33.8/2), which is 6.5x more