Some downloadable AIs are an improvement to the default AI, however they are also predictable and usaly do the same thing each time - and have no common sense, also i have heard The creator of a well known ai script is creating more advanced AI. Your right about the net, it is a whole new world, with more strategies needed and thought into how your going to act and defeat your opponent/s - that usaly have some sence
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When defeat comes, accept it as a signal that your plans are not sound, rebuild those plans, and set sail once more toward your coveted goal.