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In my personal opinion, this is one of the most challenging maps in Heroes 5. The difficulty lies both in the map's geography and in the fact that you're playing against opponents of the same faction – dwarves against dwarves. This means we can't surprise the AI with any original tactics. A typical strategy involves developing King Tolgar with skills in Light, Chaos, and Luck (other options might exist, of course), with the goal of acquiring a super ability. To achieve this, you need Chaos and Defense skills, which are useful, and the Summoning skill, which is completely unnecessary for dwarves (in my opinion). The map is large, allowing you to level up your main hero to around level 30, but I'm curious to know how other players overcame the challenge of playing "against themselves" on this map.