Object rearrangement.

In the sixth game, everything is done without this overpowered element. Plus, there are restrictions – in the city where you recruit units, there must be buildings for the required creatures with the necessary upgrades.

No overpowered elements: by the time you max out advanced wisdom, expert earth magic, and find spells, these things will no longer significantly impact the player's development, but they will save time. However, in the sixth part, it genuinely simplifies development.