[HansW]

You can try to change the navmesh to "road" along the path you want the bot to take to the fate. Its not guaranteed to take that path, the costs are just reduced. If that doesnt help, change the area the mobs you want to avoid are in to "high danger". If it still goes through, there is nothing you can do at the moment, short of removing that part of the mesh completely (you should not).

Make sure you save the mesh after the changes, or they won't take effect.

Max Fate Lvl: This setting determines the maximum fate level that your bot will attempt to complete. It is relative to your current job level.
Min Fate Lvl: This setting determines the minimum level of fate that the bot will attempt to complete. It is relative to your current job level.