I don't know how to score 150000-200000 but I scored a 61250 on my first Metaverse game so I can surely get you well above 9000.

At game setup:
(1) Disable all victory conditions except for Military Conquest
(2) Select gigantic map with everything abundant (more habitable planets means more people)
(3) Select the maximum 9 opponents
(4) Select very fast research (to research the most possible in a short game)
(5) Select the hardest difficult level you can handle

As your population grows so to does your score; however, as the years increase your score goes down, so you have to find the sweet spot. Keeping your morale at 100% will give you a 100% bonus to your population growth. I won my game with > 3 trillion people on Dec 15, 2229 (just short of 5 years but the scoring rounded it down to 4 years). So I suggest trying to complete you game in December for maximum population growth while minimizing your years. Also play as neutral to get those Neutrality Learning Centers (22 units to research each!) which will greatly speed up your research. In my short (in terms of turns but it actually took me 2 months in real time to play with my busy schedule!) game I was just 3-4 turns away from completing the tech tree! I hope this helps.

Paul D.

The AI is kinda useless until you set them to the bright setting, then they get slightly better, but are still pretty easy to deal with.

There is no meaning in Metaverse scores how many opponents you have. For maximazing you scores use only couple opponents. This leaves you hundreds planets in gigantic maps if you are quickly enough.

I agree, but I more want to belive that it's don't count

I'm pretty sure that the number of opponents isn't important for the military score. I just finished a game where I sat back and did massive tech advances while the other civs slugged it out. At the end after I had almost all techs I built three massive ships and killed several hundred ships of the other races. Since my military ranking was almost zero the entire game until the last year, my final military score was one-fifth that of the primary military race even though our final kill count was almost identical. This would imply to me that the important thing is just to keep your military ranking at or over 100 for the majority of the game for a maxed military score.