Just know that diamond coin is not realistic and still require insane luck but mathematically, the strategy of putting no.3-4 teams in 3-0 is the best strategy if the odds of no.1-2 teams going 3-0 isnt much higher than no.3-4 while the odds of no.1-2 teams advancing is clearly higher than no.3-4 team. This strategy should be marginally better than putting no.1-2 team in 3-0 bracket. The rest should be the same. Eg. no.1-2 teams have 20% chance of going 3-0, 70% chance of advancing and 10% chance of elimination, no.3-4 team have 15% chance of going 3-0 and 60% chance of advancing and 25% chance of elimination. You are essentially prioritizing a higher chance of advancing than a lower chance of 3-0 comparatively.