Yes in this case hero works as caravan. So it gives interesting option to game. Another gameplay style. And faster gameplay. It needs testing and ballancing...
Good, I have made the base movement 135% of normal in theory, with Pathfinding capping at 200% on grandmaster, which is a roughly proportional increase.
Incidentally, I think I found the Charm coefficient for captured creatures at 005891ec, but haven't yet been able to find the Diplomacy coefficient.
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