See my problem (the problem appears with sorcerers, we are more than 1 year later !).
My Actual Squad Size on Fely : 2457
New Tech Squad Size : 49, 50, 51 => 49*3+50*3+51*3 = 450
Future Squad Size : 2907
Approximate cost of province 6 star 0 for the 4 encounters (T1+T2+T3) : 16.89 * squad - 4817.1
Before : 36 682
Probably After : 44 282
This a 21% increase, but our production of ressource does not increase by 21% !!
We can do this for another province, star, ... the cost (T1+T2+T3) is linear with the squad size.
(on graph, comma = decimal separator)