DISCUSSIONS on “Rules for online games in HoMM3 and formulas for calculating player rating.”

:). I think that at level 30, you pump up "cool" skills like scouting, treasurer, wizard, catapult, etc. But at level 5, you can level up more practical skills.

No, that's not right. You can unlock level 5 in the first week and build your game around it, while level 30 is unlocked when it's no longer relevant, and often your hero is already much stronger.