I feel like the ranks shouldn’t be too linear. I recall suggesting that the ranks be updated to Gates to Infinity’s Rank System, which would be much more balanced for PMU in my opinion. A bit of expansion from “Perfect” Rank could make it work pretty well.
This would be a good expansion since ranks do go up to 9*, so having larger dungeons have missions in those upper ranges would be pretty nice.
Great comments, Demetrius!~ Also, great analysis using the game’s code, Festivo!