SotBE S9: make river edge terrain slightly less favorable for player
SotBE S9: force AI to attack enemies 1 XP from leveling

.. so that it is not possible to block key positions with such units.
SotBE S9: turn off gold saving for AI side

We want Shan Taum to throw all his forces at the player at once.
This can likely be reverted in a few days when/if the AI default is
changed, but for now it is still necessary.
SotBE S9: slight adjustment of initial village ownerships

Give Shan Taum all villages except those very close to Kapou’e’s keep.
SotBE S9: more starting gold for player

The player used to start this scenario with a lot of carry-over gold,
while now there is almost none.