Critical randomization

As of the release of GemStone IV, the critical of an attack has become more random than before. The maximum crit rank is determined as in the days of old by dividing raw damage (plus or minus critical weighting and padding) by the critical divisor and truncating the result. The minimum crit rank is determined by dividing the maximum by 2 and rounding up. Thus, a rank 7 maximum will range from rank 4 to rank 7, inclusive. A maximum crit rank can never exceed 9, and no actual crit rank will be above the maximum on any given hit. The actual crit rank is selected with an even chance for each rank in the range.