Yeah, Proportions is the name.
Proportions have Ground combat set to 5 turns. I suggest you change that to 3 turns, 1 tenth of the 30 space combat turns.
With ground combat set to 3 turns you will have a lot of planets blockaded and with ground invasions Lasting several game turns, depending of troop tech.
I would also recommend to change the number of militia per population to 1. This is because 1 militia unit fights like 1 infantry unit, and since 1 infantry unit in Proportions is compoused of 1000 soldiers (weight 1 kt) then is impossible to assume that one militia unit is 1 million men, more accurate it would be 1000 men, and is pretty safe to accept that 1 million population (1 population unit) would supply 1000 militian soldiers for planetary defense.
Of course, this means that when you assault a Homeworld you will be facing 6000 militia units ( 6 million soldiers!) in addition to defense troops that the AI always have in Proportions.
I believe these little changes bring a new meaning to ground combat in Proportions.
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