Weapon Damage:
PADamage^2 * rand(0.0085) - WDEF*A - (WDEF-StandardPDD)*B

where:

A = C + 0.28

if WDEF >= StandardPDD, then B = (C*28/45 + (CharacterLevel)*7/13000 + 0.196)
if WDEF < StandardPDD, then B = D * (C + (CharacterLevel)/550 + 0.28)

C (warriors) = STR/2800 + DEX/3200 + INT/7200 + LUK/3200
C (everyone else) = STR/2000 + DEX/2800 + INT/7200 + LUK/3200

if Character Level >= Mob Level, then D = 13/(13 + CharacterLevel - MobLevel)
if Character Level < Mob Level, then D = 1.3