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Next time: try using paragraphs, or at least interpunctuations. Your post was very hard to read. Thank you.
Second, I am sure you could make excellet feral Eldar, even though it would be hard to imagine right off the bat, but I am sure that under specific circumstances they they could go feral. Use Storm Guardian stats for a "normal" feral eldar, with cobbled-together armour and no special weapons. It would allow you to set the level of power in the band quite easily.