Good feedback. I am all tied up at the moment, so I can't test out the leveling. Nice to know it is taking longer. My goal is to have level 20 heroes by the endgame. If we are doing level 7 at that point, I will lower the E=3.20 to E=2.95. E is the exponent in the level equation. It's hard to calculate because we don't current have the whole equation. I am just guessing on how it will work.
I suspect I'm missing something. Salikgyula is saying his Pariden sovereign is level 7 in the endgame, using your previous mod version. You want a higher level for sovereigns, but you're going to lower experience gain. Or did I read the quote above incorrectly? It seems as though given the semi-random allocation of level-up traits you can get, if a sovereign can only rise to level 7 by the time the game ends, the chances of seeing tier 4 or 5 spells in any book are almost non-existent. Mind, there's nothing necessarily wrong with being a jack-of-all-trades, master of none, but with respect, that really seems like it should be a user choice, rather than built into the game.
EDIT: If the longbow does significantly better damage than the short bow for only an initiative cost of one between them, and each is priced at one to the sovereign in the character generator, it seems there's little reason to choose the short bow. Just my two cents.
Son of Edit: Adding random traits to improve AI sovereigns was one of the things I disliked the most in the Age of Wonders series. The AI was braindead, so I can understand why they did it, but Brad's a very good AI coder. I hope, like you, this is moddable, and that Stardock will come through with the info.
Daughter of Edit: If you raise water shrills' spell resistance, consider making their fire resistance nil. It seems reasonable that each elemental type of shrill would have a weakness for the opposing element.