Group of 4 & relative champions power
About the fact that having champions that can kill by themselves entire enemy armies is perhaps not ideal... or that it is relatively easy to build a stack of doom, I was wondering about a possible solution or at least an additional delay into reaching this unwanted state in the game.
If we were to have bigger groups from the start, like 4 men per group, instead of 3, then relatively, champions would have more troubles reaching the point where they can trash regular armies.
Admittedly, to keep things in balance, monsters should get a raise of +25% HP.