I feel like there's really no point in the current below-Prince difficulty levels. If a player is competent enough to find this mod, they're not playing below Prince. I feel like the difficulties could be rescaled to have a smaller increase between levels and Deity ramped up higher than it currently is. Basically, set current-Prince difficulty to Chieftain (Settler? whatever the lowest difficulty is), set current-Deity-with-the-highest-global-difficulty-setting to Deity, and scale everything in between appropriately.