This is a near-duplicate of
I want to gauge support of the same suggestion, but with a 1/4 daily rebuy instead of 1/3.
In summary:
Change the nation score formula so that Cities add 100 score instead of 50, and add a +10 base score to everyone
Change military rebuys for Soldiers, Tanks, Aircraft, and Ships such that all units are a 1/4 rebuy per day:
Soldiers: 5 Barracks per City, daily buy is changed from 1000 to 750 so: 750 / 3,000 Soldier recruitment per Barrack