4th job Single Target DPS

If Combat Mastery is a straight 40% reduction of PDR, then Jr. Pepes should be at pdr = 0.94 multiplier.

Which would mean your range is 55400 (based on ac+enrage), 56990 (based on enrage), 56484 (based on AC) -> all reductions of approx. 2300 damage

What this says to me is that the PDR reduction is not coming off as a final multiplier as expected, or the 350k is not a good approximation. If range is 57000, then real max should be 360057 with ac+enrage @ jr. pepes.