Whoever goes first gets to decide the skill that APs are based on. As to who goes first, if there is any doubt, then it's been suggested that you roll a simple contest of "quick reactions", "fast", or whatever.
Philip Hibbs http://www.snark.freeserve.co.uk/ Opinions expressed may not even be my own, let alone those of any organisations, nations, species, or schools of thought to which I may be affiliated.
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