If you read MrCynical's Power of Sushie article, he discusses a +20 Sushi Cooperation from one of his games. KillerCane had 50 sushi resources in his game, 50*0.25=roughly +12 . He was using low sea levels compared to my high sea level submission. I believe the random shore line could also play a factor. (I was using a solid shoreline). In my Huge Immortal submission, Sushi would give 21*0.25=+5 . In my large Immortal submission for HOF, I had 13*0.37=+5 from Sushi. Again, for my standard Immortal submisson, I would gain 9*0.5=+5 from Sushi. These last 3 figures are all from Pangea map type. I assume MrCynical's example is a water-rich map, possible archipelago, with definitely more sushi resources and can push for +15-20 extra range. As you can see from my examples, more or less all map sizes will yield the same number of sushi extra food. Map type, sea level setting, and shore setting seem to affect the number of sushi resources however. The number of AIs have little effect on the number of Sushi resources, but since the capital start location generator usually puts food resources around, I assume maps with more AIs would yield slightly higher number of Sushi resources. The extra food resource will increase the maximum possible population score, but this effect is rather negligible compared to the +1-2 effect through Sushi in all cities. I used this tactic you described in my game. As the end approached, I captured as many cities as I could without crossing the domination limit. I doubt you can conquer all, but you could definitely increase your final score significantly by 50-100k. Final score gets multiplied by 1.8 for Immortal and 2.0 for Deity. There is no penalty for map sizes. Larger map sizes increase the maximum population limit and consequently allow higher base scores, since each population unit adds +1 to the base score. Each land square also adds +1 to the final base score. Low sea setting on Killercane's game compared to my high sea setting also increased the maximum possible population score from 1600sh to 1900sh. This %20 increase translates to a higher final population that could make up at least +50k in final score. So, I believe best way to increase your score through Sushi would be on a water-rich huge map But you would have to build ships there and tech for Astronomy, slightly deviating from the Sushi tech path. Immortals and Praetorians would be less effective as well. Terra, huge, low sea levels sounds best, but you won't be able to hook up those rare health/luxury resources until Astronomy.