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For a Ghost, a race-warrior, defense is definitely a useful skill. It will be beneficial with a 100% probability, unlike a filler skill, which might not be useful at all (remember, we are talking about fighting Necropolis, which can have either summoning, darkness, or both). I'm not even talking about such a useful skill for Orcs as resilience, which is quite effective for the numerous levels 1-3. By the way, defense reduces the total damage received, which means it will reduce the rage cost. So, you're wrong, Ghost. The question is, what is the priority of defense compared to other skills? In my game with Haghesh, defense is developed last. But in the game with Shakk'Karukat, I develop it as early as possible, since he gets it at the start.